Truma Water Heater Reset Button [How To Reset]

When you see error codes popping up on your Truma units, you immediately look for the reset button to clear them. Sometimes, they work and sometimes, they don’t. But it’s always worth it to give it a few attempts before consulting a technician or taking it to your dealer.

We’ll discuss how you can use Truma water heater reset button to fix your Truma water heater issues as well as how to reset Truma combi boiler in this guide. You’ll also learn how to get your Aquago models unstuck from the clean mode. So, let’s dive in!

Truma Water Heater Reset Button [Explained]

There is no reset button on the control panel of Truma Aquago water heaters. Here, take a look at it for yourself:

So, what to do you do when you see error codes? Just because there isn’t a reset button doesn’t mean you can’t reset it. You have to do it manually. You may be confused as to how do it. Don’t worry, we got you covered.

First, you have to move the dial of the control panel to the “Off” position. Then, you have to go outside of the unit and remove the cover. Once you do that, it should look like this:

Now, follow these steps to reset the heater:

  • Switch of the heater by pressing the Off button.
  • Wait for a minute and turn it back on again.
  • Replace the cover outside the unit.
  • Turn the dial of the control panel to either the “Comfort mode” or the “Eco mode”.

You’ll see an amber light on the control panel when the heater has been properly reset. It means that the heater is on and ready to function properly.

This will work for both the Comfort and Comfort plus models. Hopefully, doing so will get rid of the error code. If that didn’t work, you can consult a technician or call Truma support to solve your issue.

How To Reset A Truma Water Heater Stuck In Clean Mode?

If your heater is stuck in the clean mode, you can get out of it by resetting the heater. But there are a few extra steps involved here. So, follow these steps to the T to make sure your heater gets out of that mode and works normally:

Step 01 – Check That The Unit Is Turned On

  • Make sure that the outside switch of the heater is turned on and the unit has power. You’ll see the green LED light flashing when it’s on.
  • Move the control panel knob to either the “Comfort” or “Eco” position.

Step 02 – Make The Recirculation Pump Click

  • Turn on all the hot water faucets to drain the water. It shouldn’t take more than 20 minutes to do it. Make sure you hear the circulation pump turn on and off at 30 second intervals during this process.
  • If you don’t hear the circulation pump clicking, turn the switch off and on a few times to wake it up.
  • Once the yellow light stops flashing, you can turn off the hot water faucets.

Step 03 – Reset The Rocker Switch

  • Move the control panel knob to the “Off” position.
  • Turn off the rocker switch, wait for half a minute, and turn it back on.
  • Move the control knob dial to “Eco” or the “Comfort” mode.

Doing these things should turn on your heater and get it to work properly. If it still doesn’t work, dial the control panel knob between two different positions slowly to wake up the switch.

Truma Combi Boiler Heater Reset Button [Explained]

Unlike Truma water heaters, the Truma combi boilers do have a reset button right on the control panel. If you get a simple error code, you can just press that button to reset the code. Here’s how it looks:

However, that won’t always work. When you have a more persistent error code that won’t easily go away, you need to take matter into your own hands. You’ll have to hard reset the combi boiler.

Even for hard resetting the combi boiler, you can take different approaches. Firstly, you can take off the cover of the boiler and expose the electrical cables. Then, you can disconnect and reconnect them. That could do the trick sometimes. If that works for you, no need to look further.

But if that doesn’t work, you can press the reset button after removing the cover. Here’s what the button looks like:

When you press the button, make sure you keep holding it. Don’t release or let go. The red LED light beside the switch whill turn into an amber color. When that happens, release the reset button once.

After doing that, press it down again and hold it down for about 10 seconds and release it. The amber light will stop blinking and you’ll hear the clicking of the reset button.

If you’ve reset the boiler successfully, the amber light will disappear after the clicking sound and the green LED light will come on. Check your control panel to make sure that the error code is really gone.


Does Truma Aquago water heaters run on gas or electricity?

These models of water heaters have hybrid technology. That means you can run them with both gas and electricity. You just have to select the power source from the settings depending on which one you want.

How to read Truma Aquago water heater error codes?

The LED light will blink differently depending on what error code is coming up. There are different variations of short and long flashes that you will have to compare with the manual to determine the problem.

What does E632H error code mean on Truma combi boilers?

It means that the boiler has overheated and a switch has been triggered to keep the heater from working. You need to manually reset the heater to make this error code go away.

What causes boiling noises in the water heater?

The build-up of lime causes the boiling noises in Truma water heaters. You have to decacify the unit to stop this annoying sound.


Having a proper idea of using Truma water heater and combi boiler reset button is essential to operate your unit properly and clear error codes. It’s a handy trick that you should know.

Hopefully, you have a clear idea of how to use the reset buttons by now. Sometimes, you’d have to resort to doing the hard reset on combi boilers to remove the error code. Leave a comment below if you have any further questions about using Truma reset buttons.

About David

David is a man who loves doing research and finding out the best solution to any type of heating appliance issues like heaters and fireplaces. Whenever he finds the perfect solutions to any issues of heating appliances after doing in-depth research, he loves to share them with his readers. In fact, his aim is to help his readers to fix the issues with their heating appliances easily.More about us .

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