Richmond Tankless Water Heater Troubleshooting [A Complete Guide] - HeaterFixLab (2024)

The main issues we’ll discuss in this Richmond tankless water heater troubleshooting are:

  • No Hot Water
  • Water Is Not Hot Enough
  • Water Is Too Hot
  • Sediment Build-Up
  • Cold Water Sandwich
  • Heat Exchanger Is Too Hot
  • Fan Rotates After Operation
Richmond Tankless Water Heater Troubleshooting [A Complete Guide] - HeaterFixLab (1)

The good news is we’ll not only discuss the problems but also present their solutions in detail. Without further ado, let’s dive in!

Table of Contents

  • Richmond Tankless Water Heater Troubleshooting [A Complete Guide]
  • 1. No Hot Water
  • 2. Water Is Not Hot Enough
  • 3. Water Is Too Hot
  • 4. Sediment Build-Up
  • 5. Cold Water Sandwich
  • 6. Heat Exchanger Is Too Hot
  • 7. Fan Rotates After Operation
  • How To Maintain Richmond Tankless Water Heaters
  • FAQs:
  • What to do if you smell gas from your tankless water heater?
  • Do Richmond tankless water heaters have a pilot light?
  • How to adjust the temperature in Richmond encore heaters?
  • How to reset Richmond tankless water heater?
  • Why should you use tankless water heaters?
  • How to protect your property if the water heater leaks?
  • Conclusion

Richmond Tankless Water Heater Troubleshooting [A Complete Guide]

Tankless water heaters are great as they are highly energy efficient. However, it doesn’t mean that they’re immune to problems.

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We’ll go over the most common issues you can face with your Richmond tankless water heater in this section.

Note: Read our ultimate guide on Richmond gas water heater troubleshooting and how to fix it.

1. No Hot Water

There are plenty of reasons that can cause no hot water issue in your tankless water heater. The most common ones are

  • The electrical power to the heater is disconnected or the heater is switched off.
  • Inadequate gas supply.
  • The water shut-off valve is not fully opened.
  • Freezing of the water piping.
  • Setting the thermostat too low.
  • Not opening the hot water faucet completely.

However, they’re not the only issues that can lead to the no hot water issue. If you’re still facing this problem, it could also be due to the following reasons:

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  • Malfunctioning mixing valves.
  • Clogged or dirty water filter.
  • Scale build-up in the heat exchanger.
  • Reversed hot and cold water lines.
  • Dirty fixture aerator.

If you’re using a Richmond tankless electric water heater, you may also face this issue. It can be due to the same reasons mentioned above. But a poor flow rate can also cause this issue.

Solution:

As you can see, we’re dealing with a pretty big list of potential issues here. Let’s rule them out one by one. First thing first, make sure your power outlet is okay and the circuit breakers are not tripped. Turn the heater on by pressing the “Power” button and see if it has power.

The next thing you have to make sure of is that you have a proper gas supply. If the gas lines are clogged, the heater won’t work properly. Check that the gas valve is on and replace the gas lines if needed.

Thirdly, check if the water shut-off valve is not fully open. If it’s not, then open it completely and that’ll solve the issue. Next, check if the pipes are frozen. If they are, allow them to thaw and you’ll eventually get sufficient hot water.

Check the thermostat and see what temperature you’ve set. If you’ve set it too low, turn it up. Next, inspect whether you’ve fully opened the hot water faucet. If not, open it completely and that’ll solve the no hot water issue.

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As we’re dealing with many potential issues, the above picture is a quick summary of the fixes. Hopefully, that’ll help you narrow down the issue and act fast if you’re dealing with the no hot water problem.

However, we’re not even close to being done and have only discussed the first half of this problem. The next thing you need to be on the lookout for is the mixing valves. If they’re not working properly, you have to replace them.

After that, you should check the water filter. If it’s clogged or dirty, you need to take it out and clean it. Here’s a step-by-step guide on doing it:

Step 01 – Drain The Heater

  • Switch off the water heater
  • Disconnect the power supply to it.
  • Turn off the cold water supply.
  • Drain the water heater. If you don’t know how to do it, we’ll discuss how to do it later on in this article.

Step 02 – Remove The Water Filter

  • Locate the water filter at the base of the cold water line.
  • Unscrew it and slide it out of there.
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Step 03 – Clean & Put The Water Filter Back In

  • Start by placing the filter under running water to get rid of the dirt.
  • Next, use a soft brush and get the sediment out of it.
  • Place the filter back into the cold water line and tighten it.
  • Reconnect the power and cold water supplies to the heater.
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If a dirty filter was causing the issue, that’s how you can clean it and solve the problem. But if that’s not it, the next possible culprit here is the build-up of scale in the heat exchanger. You can solve it by flushing it. Follow these steps to do it:

  • Turn the remote control of the heater on.
  • Turn off your heater gas supply.
  • Turn off the water supply to the unit.
  • Keep pressing the down arrow button until you get to the lowest temperature.
  • Press and hold the down and up arrow buttons together for 5-10 seconds.
  • Turn the gas and water supply back on.

If that doesn’t work and you’re seeing error codes that point to a bad heat exchanger, you should call a qualified technician. At times, you may even have to replace the heat exchanger.

Clean the aerator if it’s clogged or dirty. Finally, flip the hot and cold water lines if they’re reversed. Next, ensure that you’re achieving the recommended minimum flow rate if you’re using a tankless electric heater.

And that’s the complete fix for all the reasons that can keep you from getting hot water in your heater. Here’s a quick summary of the second part of the fixes so that you don’t get lost.

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2. Water Is Not Hot Enough

If the water is not hot enough in Richmond condensing tankless water heaters, here’s a list of the most common reasons behind it:

Richmond Tankless Water Heater Troubleshooting [A Complete Guide] - HeaterFixLab (8)
  • You’ve set the thermostat too low.
  • The gas valve is not opened completely.
  • Using multiple hot water faucets at the same time.
  • The gas pressure is too low.
  • There’s a bleed over in any of the hot water fixtures.

Besides these issues, you may face the same issue in a Richmond tankless electric water heater due to the following reasons:

  • The flow rate of the water is too high.
  • Incorrect wiring.
  • Thermal loss due to long pipes.
  • The voltage is less or more than the range of 120-240 volts.
  • Mixing excessive cold water.

Solution:

Now that we know the problems, let’s go over the solutions depending on the issues. Firstly, turn up the thermostat if you’ve set it too low as that’ll increase the temperature of the water. If you can’t set the temperature you can read our ultimate guide on how to adjust the temperature on the Richmond water heater.

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Make sure the gas valve is opened completely as an inadequate gas supply won’t heat the water properly. Check the gas pressure if you have a manometer or get it checked by a professional. If there are issues with it, get your local utility company to fix it for you.

The next thing to check is whether you’re using multiple faucets together. It’s not an issue with the heater as you’re trying to use it beyond its capacity. You can solve this problem by installing a mini tank to fulfill your hot water needs.

Finally, if there’s a bleed over in one of the hot water fixtures, it’s a good idea to hire an expert to solve it. We don’t recommend you attempt fixing this one on your own as all problems don’t have a DIY solution.

Richmond Tankless Water Heater Troubleshooting [A Complete Guide] - HeaterFixLab (10)

The above picture was a summary of how you can solve the issues in condensing tankless heaters. Now let’s move on to their electric counterparts.

Firstly, if the water flow rate is too high, the heater won’t be able to fully heat the water. In that case, you need to install an aerator to decrease the flow rate of water to your heater.

Secondly, you’ll have to correct the wiring if there are any issues with it. It’s a common problem for people who have newly installed their heaters. If that applies to you, find the fault with the wiring and correct it.

If your hot water faucet is at a long distance from your water heater, it’s normal for the temperature to be low. The closer the faucets, the hotter the temperature will be. You can fix it by increasing the settings on the thermostat.

The water heaters are programmed to work for a range of 120-240 volts. If you have a lower or higher voltage, your heater won’t work properly. Check the voltage in your house. If it’s out of that range, you can either increase the temperature in your heater or upgrade to a larger unit.

Finally, mixing too much cold water can also cause this issue. Adjust the faucet so that you can decrease the amount of cold water that’s being mixed. You need very little cold water in tankless water heaters compared to their tank counterparts. Hopefully, you’ll get hot water from your heater now.

Here’s how you can fix the water not being hot enough problem in your Richmond tankless essential heater at a quick glance:

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3. Water Is Too Hot

Another common issue with Richmond tankless heaters is that the temperature of the water will be too hot. Here are the most common reasons behind overheating water:

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  • Setting the temperature too high.
  • Partially opened water shut-off valve.
  • Only a small amount of water has been heated.
  • The hot water faucet’s temperature is too hot.

Solution:

First, check if you’ve accidentally set the thermostat too high. You can fix it easily by lowering the temperature settings. Next, check the water shut-off valve and make sure that it’s fully open.

If only a small amount of water is heated, that means you have a poor flow rate. Increase the flow rate in your house and make sure it matches the required settings of the heater.

For example, the minimum flow rate required in a Richmond condensing 9.5 GPM indoor tankless heater is 0.4 GPM. The maximum flow rate for this heater is 1.3 GPM. Similarly, check your owner’s manual, find the recommended flow rate, and have it adjusted to that.

Finally, the next thing you should inspect is if the temperature of the hot water faucet is too high. It can be due to the wrong aerator size, little flow of water, or the failure of an internal part.

If replacing the aerator or adjusting the flow rate doesn’t fix the issue, we recommend hiring a technician. Here’s a quick look at everything we’ve discussed regarding the overheating water issue:

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4. Sediment Build-Up

Magnesium and Calcium are the two minerals that are the enemies of tankless water heaters. If you live in an area where you’re supplied hard water, your heater’s water filter can get quickly clogged up and you may also end up leaving a sediment build-up inside your tankless water heater.

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A common sign of knowing if you have sediment build-up is having smelly and discolored water from your hot water faucets. If you don’t take care of it quickly, it can also affect the heat exchanger.

Solution:

You’ll have to flush the heater to get rid of this issue. The first thing you need to do is to drain the water heater. Follow these steps to do it:

  • Switch off the water heater by pressing the power button and turn off the gas supply to the heater as well.
  • Wait for a few seconds and disconnect the heater from its power outlet.
  • Open all the hot water faucets and run them until you get cold water. Close the water shut-off valve.
  • Place a bucket or container under the drain plug to catch the water. Remove the drain plug, drain valve, and water filter.
  • Attach one end of a garden hose to the drain valve in the hot water line and place the other end where you want to discard the water.
  • Once you get rid of all the water in the tank, you can put everything back together. But we won’t be doing that if we plan to flush the heater next.

Next, you can proceed to flush the heater. There are many flush kits available that you can use to clean your tankless water heater. You can always hire an expert if you’re not comfortable doing it yourself. However, if you want to do it yourself, here are the steps:

Step 01 – Setting Up The Flush Kit

  • Open the pressure relief valve connected to the hot water lines to let go of the pressure built up in the heater.
  • Connect the hoses of the flush kit to the service valves and place the pump inside a bucket.
  • The cold inlet line should be connected to the pump and the hot water line should be connected to the hose that stays inside the bucket.

Step 02 – Letting The Descaling Solution Run

  • Put the descaling solution in the bucket.
  • Turn on the pump and let it run for at least an hour.

Step 03 – Putting Everything Back Together

  • Once the solution has removed the minerals in the heater, turn off the pump.
  • Make sure you get rid of any remaining fluid from the heater.
  • Disconnect the pump, and the hoses, place everything in the original order and run your heater again.

Remember that you’ll have to flush your water heater once a year if you live in an area with hard water. You should also install a water softener to prevent the build-up of minerals and keep this problem at bay.

Here’s a quick summary of how you can solve the mineral build-up issue in your tankless water heater:

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5. Cold Water Sandwich

A cold water sandwich means you get hot water initially when you open the hot water faucet. Then, you get cold water, and then, you get hot water again. As you get a burst of cold water between two layers of hot water, this issue is called a cold water sandwich.

It’s a common issue in tankless water heaters. What happens here is the hot water from your last use stays inside the faucet. When you turn on the faucet, you get hot water.

But you get cold water after that as the heat exchanger isn’t still ready to heat the new water. Eventually, the heat exchanger starts doing its job and you get hot water again.

Solution:

As nothing is really with your heater here, you don’t necessarily need to take any corrective action here. If you can be patient and wait for a while while the cold water turns into hot water, you can get around this issue.

But if you want a permanent solution without having to wait for hot water, you can install a small tank water heater. It’ll increase the capability of your water heater and give you hot water without the sudden burst of cold water.

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The above picture is a quick action plan to help you decide what to do when you face this cold water sandwich issue.

6. Heat Exchanger Is Too Hot

An overheating heat exchanger is a major issue that you may come across at times when using your Richmond water heater. It’ll often throw the error code 15 to indicate this issue.

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The two main reasons behind this issue are either a blockage in the vents or a faulty heat exchanger.

Solution:

Check the vent system and see if you can find any blockage in there. If you can, remove it, shut off your heater for a while, and turn it back on. Hopefully, that’ll take care of the problem.

Remember that you should check your venting system at least once a year. If you fail to do so, you can face many problems along with an overheating heat exchanger. It can lead to carbon monoxide and lead to asphyxiation, fire explosion, or major accidents.

You should always use a separate vent for your heater and not mix it with other appliances. If your venting system is fine, you most likely have a faulty heat exchanger that needs to be replaced. We recommend you hire a certified technician to do it.

Here’s a quick reminder of how you can solve the issue of an overheating heat exchanger:

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7. Fan Rotates After Operation

Once you turn off the hot water faucet, you may expect the heater to turn off. But more often than not, you’d hear the fan running even after closing the hot water faucet. Many people complain about that and think that something is wrong with their unit.

In reality, it’s only a part of the normal operation of the heater. The fan stays on to clear the flue gases that were produced when it was producing hot water.

Solution:

As it’s a normal thing to happen, there’s no need to take any corrective action here. Once the flue gases are dissipated, the fan will turn off on its own. So, here’s a quick reminder in case you forget how to deal with this issue:

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How To Maintain Richmond Tankless Water Heaters

Maintaining your Richmond tankless heater properly will keep it from going bad. It’s a much better approach to take care of your heater at regular intervals rather than only fixing it when something goes wrong with it.

Here are some maintenance tips that’ll hopefully help you out in getting the most from your Richmond tankless water heaters:

  • Check the venting system of your heater at least once a year and make sure there are no blockages in it and everything fits nicely.
  • The burner should be inspected annually. Remove the screws, take off the cover panel, and run a hot water faucet. As you look through the sight glass, you should see a blue flame from the burner. If not, consult a technician.
  • Keep the area around the heater free of flammable materials at all times.
  • Make sure you’re protecting your water heater from freezing and that there’s no water inside the heater if you plan to turn it off for a long period.

FAQs:

What to do if you smell gas from your tankless water heater?

If you smell gas around your heater water, you shouldn’t try lighting it. Leave your building immediately and call your local gas supplier for help. Call the fire department if you can’t reach them.

Do Richmond tankless water heaters have a pilot light?

There is an ignition device in Richmond tankless water heaters that lights the burner automatically. So, there’s no need for a pilot light. You shouldn’t try to light the burner by hand manually under any circ*mstances.

How to adjust the temperature in Richmond encore heaters?

You’ll have to use the temperature adjustment buttons. Press the button with the up arrow to increase the temperature and the button with the down arrow to reduce the temperature.

How to reset Richmond tankless water heater?

As there is no reset button on Richmond tankless water heaters, you’ll have to do it manually. Turn off the hot water faucets and the power button. Then, wait for five minutes and turn the heater back on.

Why should you use tankless water heaters?

Apart from the obvious benefit of not requiring a large tank, tankless water heaters can help you save anywhere between 30 to 50 percent on fuel expenses. They’re also incredibly durable.

How to protect your property if the water heater leaks?

Though it’s not likely for water heaters to leak, you should install a catch pan under your heater. If that doesn’t sound good, use a leak detector and it’ll shut off the water supply when a leak takes place.

Conclusion

This Richmond tankless water heater troubleshooting guide has covered all the major issues you can possibly face with your unit. Not only that, but you also know how you can fix each of these issues.

Let us know what was causing the issue with your tankless heater and how you ended up solving it. If we left something out or you have any questions, drop a comment below. We’d love to hear from you.

“Read our guide on why Navien tankless water heaters no hot water and how to fix it“.

Richmond Tankless Water Heater Troubleshooting [A Complete Guide] - HeaterFixLab (2024)

FAQs

Why is my tankless water heater not detecting flow? ›

Check the gas valve and ensure that it is open, and that you have paid your gas bill. Check all sensors, wiring fuses, and electrical components to ensure they have not burned out. Ensure there is no condensation or debris on the burners that may cause them to not ignite.

What is error code 12 on Richmond tankless? ›

This means that the unit is detecting a flame, but the flame is being extinguished during operation (weak flame).

What could be wrong with my tankless water heater? ›

Water Isn't Hot Enough

The water temperature may be set too low. The water filter may be clogged resulting in low water flow. There could be a problem with the gas supply or pressure. There may be a plumbing crossover.

Do tankless water heaters have a reset button? ›

The tankless water heater reset button is located on the front or right side. The good news is that pretty much all of them have this button. If you cannot find the reset button on the front or right side, look at the back of the machine. If you cannot find the reset button, call customer service.

Why is my water heater not turning on? ›

Check Your Power

One of the most common issues is that a hot water heater is not receiving power. First, check the circuit breaker or fuse box. If the breaker has been tripped or a fuse has blown, it will need to be reset or replaced before you can continue using your water heater.

Why does my tankless hot water heater go cold? ›

A broken flow sensor can cause your tankless water heater to run hot and cold. The flow sensor measures the water entering your system and sends that information to your unit's control board. If there's a burst of cold coming into the system, then the controller adjusts the flame.

Do tankless water heaters have fuses? ›

Tankless water heaters are protected by a built-in overheat cut off fuse that disengages the gas valve if there is a breach in the heat exchanger wall or gaskets around the combustion box.

What is code 11 on a Richmond tankless water heater? ›

11 No Ignition Check that the gas is turned on at the water heater, gas meter, or cylinder. Ensure gas type and pressure is correct. Ensure gas line, meter, and/or regulator is sized properly. Bleed all air from gas lines.

What is error 29 on Richmond tankless water heater? ›

The neutralizer is designed to drain condensate away from the heater. If the neutralizer and/or drain becomes blocked up, the unit will flash the 29 error code to prevent the burner from being flooded.

What is code 10 on Richmond tankless water heater? ›

Check that the air ventilation openings are open and clean, if necessary. Rheem fault code 10 – This is the false flame detection code. Before calling for service, check to make sure that nothing is blocking the flue inlet or exhaust.

Can a tankless water heater get clogged? ›

What happens if I don't flush out my tankless water heater? Mineral deposits may build up. This could cause a clog within the unit and may prevent normal heating activity. Your hot water could also fluctuate and overheat the system, impacting its efficiency.

Why is my tankless water heater so cold after a few minutes? ›

Low water pressure is one of the most significant reasons why the tankless water heater suddenly cold during the shower. The flow within your device is lower than the activation flow rate required, resulting in the closing down of the gas burner or it may not ignite the burner at all.

How do you know when a tankless water heater needs to be replaced? ›

7 Signs Your Tankless Water Heater Need to Replaced
  1. Inconsistent Water Temperature. If there are issues with the water heater, you will notice frequent changes in the water temperature. ...
  2. Reduced Pressure. ...
  3. Leaks. ...
  4. High Energy Bills. ...
  5. Strange Noises. ...
  6. Water Quality. ...
  7. Not Enough Hot Water.

What happens if I push the reset button on my water heater? ›

If your water heater loses power, your water heater's reset button can be used to turn the appliance back on. However, your reset button serves as a safety device and turns the unit off when the water temperature gets too hot.

How long to press reset button on water heater? ›

Resetting a Gas Water Heater

For most units, you can get in the hot shower within 30 to 40 minutes for gas water heaters. For electric tanks, you need to wait for approximately an hour to an hour and a half.

Why does my tankless water heater keep needing to be reset? ›

In some cases, the water heater reset button will repeatedly trip. This is a warning sign of a larger issue such as a faulty thermostat, loose wiring, corroded parts, a grounding problem, or a malfunctioning high limit switch.

Do you have to reset tankless water heater after power outage? ›

Try resetting the thermostat by first bringing it down to zero. Wait for a couple of minutes and take it to the desired temperature. Hopefully, your water heater not working after power outage should be resolved. If this does not work, the chances are that you may have to replace the thermostat itself.

How do I know if my water heater fuse is blown? ›

A tripped breaker or blown fuse will result in total loss of hot water and is always the first thing to check. If, for any reason the tank gets too hot, the high temperature safety switch will shut off all power to the water heater. You must then firmly push the red button on the top thermostat to reset it.

What to check if water heater is not working? ›

Check for any obviously loose plumbing connections, tightening (but not over-tightening) them to reduce the leak. Next, check the loose heating element bolts, tightening them if needed. If the heating element is still leaking, you will probably need to replace the gasket (we recommend hiring a professional to do this).

Why does tankless water heater take so long to heat up? ›

Distance Between the Heater and Tap

The longer the distance between your water heater and the tap, the longer it takes for the hot water to reach the tap. This delay is due to the time it takes for the hot water to travel through the pipes.

How do I keep my tankless water heater warm? ›

Insulate your water heater and the pipes running to and from it using fiberglass or polyethylene insulation or heat tape. Run a trickle of warm water – Avoid a frozen pipe problem by running a trickle of hot water overnight from the tap furthest from the water heater.

What is error 13 on Richmond tankless? ›

As air enters the combustion chamber, the sensor reads that air quality is sufficient for combustion. If incoming air or outgoing vent are not correct, then tankless sensors shut down the burner. What does error code 13 mean? 1) Oxygen depletion.

How do you fix code 11 on a tankless water heater? ›

Inspect the flame rod and make sure that the wiring look is in good condition and all connections appear secure. Look for any dirt or debris on the flame rod or gasket, and clean if needed. If the parts appear damaged or cracked, they will need to be replaced.

Why is my electric tankless water heater not getting hot? ›

The Air Supply or Exhaust Is Blocked

At times, your exhaust or air supply might get blocked, which can cause your tankless water heater to stop heating. Many water heaters will automatically shut off as a way to protect the appliance and help prevent other safety hazards that could result.

What is error code 14 on Richmond Encore tankless water heater? ›

An error code 14 indicates a significant overheat of the heat exchanger has occurred and the thermal fuse had to step in and shut the unit down. Much like a fuse in automotive applications or other electrical uses the thermal fuse is a one time use part as it is physically broken once it's tripped by an overheat.

What is code 14 on Richmond water heater? ›

Code 14 will be displayed on the controller if the PCB does not see continuity through the thermal fuse circuit (thermal fuse and overheat switch #1) during the start sequence. You will need to attempt to operate the water heater in order for this code to be posted.

What is error code 20 on tankless water heater? ›

EC20 or Error Code 20 The error code 20 means the High Limit Switch has been triggered.

What is code 122 on tankless water heater? ›

If you receive a code 122 that indicates an overtemperature condition, first reset the limit switch, then isolate the component causing the over temperature condition. Avoid the temptation to replace the limit switch, the cause is almost always elsewhere in the heater.

What is error code 52 on tankless water heater? ›

Error Code – 52

Measure resistance of valve coil. Check voltage to the POV valve while unit is trying to fire.

What is error code 76 on Richmond tankless water heater? ›

Error message C7-76: communication problem between remote control and tankless unit. Temporary fix: Power off at remote control, wait 5 minutes and power back on, and then it should work.

How do I know if my water heater is clogged? ›

Connect a garden hose to the drain valve and open the valve. Open a hot water faucet in your house and leave open; this will counter any negative pressure in the tank. If water comes out the hose and runs clear, no clogged valve. If it barely trickles or there is no flow at all, your drain valve is clogged.

Does low water pressure affect tankless hot water heater? ›

Low water pressure.

Deposits inside the heat exchanger can cause the outlets from the tankless system to become clogged. If you notice low water pressure coming from your hot water faucets, these clogs might be the reason. The most common cause of these deposits is hard water.

Why is my water heater only hot for a few minutes? ›

Pete's professional advice on replacing your water heater is as follows: “If you are only getting 5-7 minutes of hot water for showers, and you can't fill the tub up with hot water, then it's likely the dip tube in your hot water tank that needs replacement.

Why is my water getting cold after 10 minutes? ›

Low water pressure

If your shower goes cold after a few minutes, it might be that you've been unlucky enough to be showering just as the water pressure dropped. The best thing to do is see if other taps are experiencing lower pressure, plus check if your neighbours are experiencing a problem too.

Why do I run out of hot water in 10 minutes? ›

Water Heater Runs Out Of Hot Water Quickly: Possible Reasons Why. As mentioned above, several things can cause a home's hot water supply to run out faster than it should. The three most common culprits are sediment build up, a faulty heating element and a broken dip tube.

How often should tankless water heaters be flushed? ›

To properly maintain and clean your tankless water heater, it's important to flush those mineral deposits at least once a year. Follow this simple process to ensure optimal tankless water heater performance and efficiency.

How often do tankless water heaters need maintenance? ›

Generally, your tankless water heater should be serviced at least once every year. If you have hard water, then you might need to service it twice yearly. During each servicing, a technician will carry out several tasks including cleaning the filter and flushing out the system.

How do I know if my tankless coil is bad? ›

If its cold pressure climbs abnormally then either there is a tankless coil leak out of the water heater into the heating boiler or the water feed for the boiler itself is defective, If the cold pressure does not climb but the relief valve is leaking on either device, then the fault is probably the relief valve itself.

Why would a tankless water heater need to be reset? ›

If your water heater loses power, your water heater's reset button can be used to turn the appliance back on. However, your reset button serves as a safety device and turns the unit off when the water temperature gets too hot.

How do you push reset a water heater? ›

Somewhere on your electric water heater, you'll find a reset button. It's usually red and often located near the thermostat. It may also be hidden behind a removable metal panel on the unit—and then behind some insulation. Once you find the button, push and release it.

Do you have to turn power off to reset water heater? ›

Cut off the Power to the Water Heater

Locate your home's main electrical panel. They are usually found in the garage, a storage closet or a utility area. Either way, you need to make sure the electric power to the water heater is OFF before you go on to step two.

Is it OK to reset water heater? ›

Having to reset the water heater continuously isn't a good sign. This can be dangerous as electric water heaters are complex systems that need to work well in order to prevent fires or scalding. If the red button on the water heater keeps tripping, it can mean that your water heater isn't working at full efficiency.

What is the red reset button on water heater? ›

The reset button: a red button located on the water heater itself (just above the thermostat) that trips when the water temperature exceeds 180 F. The reset button is sometimes referred to as the “ECO” (emergency cut off) or “high limit switch”.

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