Rheem Tankless Water Heater Code 76

Defective remote control or its wiring is the main caveat that causes your Rheem tankless water heater to throw the error code 76. If you change the remote control or replace its wiring, it will help you clear the error message.

But what if this troubleshooting method will not work or fail to eliminate the warning message? What do you do to clear the error code? To know the answer to these questions, read on between the lines.  

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Rheem Tankless Water Heater Code 76 [How To Fix]

Your Rheem Tankless Water Heater Code will display the error code 76 because of faulty communication with the remote control. Below, we will reveal the underlying reasons responsible for displaying the warning code 76. 

Defective Remote Control or Wiring

A faulty remote control or loose remote control wiring is the main culprit that pops up error code 76 on the display. 

Before finding out the source of the problem, we recommend you pull out the remote control wiring from the wiring terminal on the PCB. Now, plug the water heater into an electric outlet and turn on a hot water source. 

If the unit turns on, understand there is a problem either with the remote control or its wiring. To identify the main reasons for this water heater problem, take a good jumper wire. Then, attach this wire to the remote terminal on the PCB. 

Now, try to turn on your water heater using the remote control. If the unit comes on, the wiring of your remote control is at fault. On the other hand, if you can’t turn on the unit, we bet the remote control gets defective. 

How To Fix: 

Fortunately, you can easily fix the issues if it’s the problem with your remote control or its wiring. If the wiring of the remote control gets damaged, replace the wiring. On the other hand, you should change the remote control to a new one. In this case, you need to spend a few bucks from your wallet. 

Bad Filter Capacity

Only a defective remote control or its wiring does not cause the water heater to show the error code 76. A bad filter capacitor is also responsible for this issue and we learned it a hard way. 

We also encountered this Rheem water heater issue once. To solve the problem, we checked out the troubleshooting manual and it says there is a problem with the remote control. So, we bought a new remote control. But the heck is- changing the remote control didn’t bring any luck to us. 

Then, we come to the realization that there must be a problem with the water heater control board. And our thought was right as we found the ceramic disk capacitor across the remote control terminals is at fault. 

How To Fix:

Once you figure out that the problem is actually with the capacitor, we recommend you change it to a new one. And guess what, it doesn’t take you more than 20 or 30 cents to get the capacitor. However, try to avoid using an electrolytic capacitor unless you are sure of the polarity. 

Relevant: Rheem Tankless Water Heater Error Codes


How do you clear the error code on a Rheem tankless water heater?

First off, find out the underlying reasons behind the error codes you can see on the display. For example, if you see the error code 76 on the display, it means there is an issue with the remote control or the wiring itself. A bad capacitor is also responsible for this problem. Once you fix both those issues, you should reset your Rheem tankless water heater to clean the error code.

Why does my Rheem tankless water heater keep shutting off?

Your Rheem tankless water heater keeps shutting off if it fails to supply sufficient hot water per minute.

Where are fault codes displayed Rheem?

The fault codes are displayed on the LED display panel. You can find the display on the front of your water heater.


According to the troubleshooting manual, the error code 76 on Rheem tankless water heater is shown due to a failure in communication with the remote control. 

In simple words, you can see the error message 76 if the remote control or its wiring gets defective. Regarding this, changing the remote control or fixing its wiring will solve this issue. 

However, sometimes your water heater will throw the error message 76 due to a bad capacitor. We recommend you first try to fix the capacitor issue. Then, replace the remote control wiring or the remote control itself to clear the error code from the display. 

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