Truma AquaGo Water Heater Problems [5 Easy Fixes]

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The most common Truma AquaGo water heater problems are the heater not heating, the pump running dry, the hot water temperature too low, leaking water, and no flame detected.

Keep reading this Truma AquaGo water heater troubleshooting guide to diagnose the issue and find the solution to these problems. Let’s jump in!

Table Of Contents

Truma AquaGo Water Heater Problems [5 Easy Fixes]

If you’re wondering why is my Truma water heater not working, you’ll find the answer in this section. Follow this troubleshooting guide to make your Truma water heater fault finding easier.

1. Truma AquaGo Not Heating

If you don’t find hot water coming out of the tap, there could be several reasons behind it. Here are the most common causes why the Truma water heater doesn’t supply hot water:

  • The gas tank doesn’t have enough gas or the supply is interrupted.
  • The power supply of the Truma water heater is turned off.
  • The supply of fresh water is turned off.
  • There’s a defect in the water heater.

Solution:

Make sure you have sufficient gas to heat the water and the supply of gas isn’t interrupted by anything.

Turn on the heater and ensure that your fresh water supply is on. If doing these things doesn’t solve the issue, you can contact the Truma water heater tech support to help you with your problem.

2. Truma AquaGo Pump Running Dry

When the heater signals error code 27, it means that the pump is running dry. Here is the sequence that you’ll see from the Truma water heater flashing light when you have this error:

This problem can be caused because of the following reasons:

  • If your Truma heater is equipped with a bypass valve, you may have accidentally left it open.
  • Mixing hot and cold water can cause this issue.
  • Air in the water lines can also cause the pump to run dry.

Solution:

Try these things to get the heater back to normal operating condition:

  • Make sure your bypass valve is closed to get rid of the problem.
  • Turn the outdoor shower off so that the cold water doesn’t mix with the hot water.
  • Open your hot water fixture to free any air that exists in the water lines.

If the solutions mentioned above don’t work, drain your AquaGo heater and refill it. Open all hot water fixtures for at least 15 minutes to allow the air to pass from the water system. That should return the AquaGo heater to normal operation and solve this issue.

3. Truma AquaGo Hot Water Temperature Is Low

One of the most frustrating Truma AquaGo problems is when the temperature of the hot water is too low. These are the most probable causes behind it:

  • Insufficient flow of gas to the heater.
  • The temperature of the cold water is too low and the volume flow of hot water is too high.
  • The build-up of calcium and limescale in the Truma water heater.

Solution:

The minimum pressure required for the proper supply of gas is 105 WC. Check if that’s the case by consulting a technician. Bring down the flow of hot water and reduce its flow rate.

If there’s a build-up of limescale or dirt in the heater, you need to decalcify it. It’s good to maintain and decalcify the heater at least once a year to expand its life. You’ll learn how to do that further down the line in this article.

4. Truma Water Heater Leaking Water

The causes behind a Truma AquaGo water heater leaking are:

  • The pressure of the water system in the RV is too high.
  • Accumulation of dirt in the Pressure Relief Valve.
  • Dirty O-rings on the filter cartridge.

Solution:

Here are the fixes you can use for each of these problems to fix the issue:

  • Adjust the water pump pressure to make sure that it doesn’t exceed 65 psi.
  • Cool the water heater, flush the water system to get rid of the dirt, and replace the PRV.
  • Clean or replace the O-rings.

5. Truma AquaGo No Flame Detected

One of the common Truma water heater problems is that it won’t detect the flame. The heater will display error code 1 if the heater can’t detect any flame.

There’ll be 7 short flashes followed by 1 long flash to signal this error. Here are the potential causes behind it:

  • If there’s anything like a lawn chair that’s blocking the front door.
  • Not having enough propane or it is turned off.

Solution:

If you have anything that’s blocking the supply of air to the front door, move that object from there. Make sure that you have enough propane and that it’s turned on.

How To Maintain Truma AquaGo Water Heater?

You need to do Truma water heater maintenance only once a year by decalcifying it. Also, check the O-rings of the stainless steel filter cartridge once a year and make sure that they are in proper condition.

You’ll need to get the Truma decalcifying tablets from their website or your local RV dealer to decalcify your water heater. Here are the steps you need to take to decalcify it:

  • Drain your water system. Pull the yellow lever of the Truma water heater.
  • Pull out the cartridge filter. Place all six tablets at the end of the filter cartridge with a glass panel.
  • Put the cartridge back in and close the lever. Refill your water lines by turning the water on and opening a few taps.
  • Get to the Truma AquaGo switch and put it in the “clean” mode. Wait for 2 hours as the heater will clean.
  • Turn on some taps and leave them on for at least 15 minutes. Your water system is now back to top-notch condition.

How To Winterize Truma AquaGo Water Heater?

Follow these steps to winterize the water heater:

  • Locate the water box or the water station of your RV.
  • Turn it to “winterize sanitize fixtures” as it isolates the water heater from the water system.
  • Get to the AquaGo water heater and pull the yellow lever.
  • The water will start to drain out and make sure it drains all the water.
  • Close the lever and your water heater is now winterized.

How Do You Reset Your Truma Water Heater

To reset your Truma water heater, hold on the on/off button found in the control panel until the display turns off.

Wait ait for 1 minute and then turn the dial of the heater control panel to either the “Comfort mode” or the “Eco mode”. The reset will be done.

FAQs:

What is the Truma AquaGo water heater price?

The Truma AquaGo water heaters come in two variants – Comfort & Comfort plus. At the time of this post, the comfort variant retails for $1100 and the Comfort plus variant goes for $1300.

What is the benefit of using the Truma water heater eco mode?

You can lower your bill by saving energy and also prevent the water from freezing by using the eco mode. The temperature of the hot water will be around 50 degrees when you use the eco mode.

Conclusion

Now you know the most common Truma AquaGo water heater problems and how you can solve them. Yearly maintenance of your heater will make sure that your heater runs well over a long period.

We hope this guide will help you fix your problems with Truma water heaters. Leave a comment below if you have any questions.

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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7 thoughts on “Truma AquaGo Water Heater Problems [5 Easy Fixes]”

  1. We have a water leak in our Truma AquaGo Comfort ‘inside’ the rear of the compartment where the fresh water enters the unit. It appears from looking into the tightly fitted components that it is the water line fitting.

    It cannot be accessed from the rear as it is sealed, nor without removing all of the front systems to gain access to the back of the unit.

    Is it possible to remove the front parts of the system to gain access to the rear left side to find the lead. It was discovered by accident when small amounts of water were dripping at the bottom of the cover. We have never used the unit since purchase about a year ago. It is a 2019 Oliver Elite II. We Boondock Off the Grid and warm water on the Cook Top and wash ourselves outside. Eliminates filling the Grey Tank and when camping we never use the Shower System… so… is there a way to access from the front, or need to detach all of the connections and pull the entire unit out?

    Reply

    • Hi Ray

      As your heater is only one year old, it would be wise to contact the Truma AquaGo customer support center or your local Truma AquaGo dealer.

      Best of Luck!

      Reply

  2. We have a water leak in our Truma AquaGo Comfort ‘inside’ the rear of the compartment where the fresh water enters the unit. It appears from looking into the tightly fitted components that it is the water line fitting.

    It cannot be accessed from the rear as it is sealed, nor without removing all of the front systems to gain access to the back of the unit.

    Is it possible to remove the front parts of the system to gain access to the rear left side to find the leak. It was discovered by accident when small amounts of water were dripping at the bottom of the cover. We have never used the unit since purchase about a year ago. It is a 2019 Oliver Elite II. We Boondock Off the Grid and warm water on the Cook Top and wash ourselves outside. Eliminates filling the Grey Tank and when camping we never use the Shower System… so… is there a way to access from the front, or need to detach all of the connections and pull the entire unit out?

    Reply

  3. We have a water leak in our Truma AquaGo Comfort ‘inside’ the rear of the compartment where the fresh water enters the unit. It appears from looking into the tightly fitted components that it is the water line fitting.

    It cannot be accessed from the rear as it is sealed, nor without removing all of the front systems to gain access to the back of the unit.

    Is it possible to remove the front parts of the system to gain access to the rear left side to find the leak. It was discovered by accident when small amounts of water were dripping at the bottom of the exterior cover.

    We have never used the unit since purchase about a year ago. It is a 2019 Oliver Elite II. We Boondock Off the Grid and warm water on the Cook Top and wash ourselves outside. Eliminates filling the Grey Tank and when camping we never use the Shower System… so… is there a way to access from the front, or need to detach all of the connections and pull the entire unit out?

    Reply

  4. Hi
    We have a Truma Aqua Go in our 2022 Dynamax Force. Lately, our Truma will make a loud moan for about 5 seconds when we turn on the hot water. Doesn’t happen every time but is more pronounced. We have not decalcified yet.

    Reply

    • Hi Cheryl

      Suond produces from your water heater may be due to sediment build up that is common issue if you are living in a hard water area.

      Infact, steam bubbles can form under the sediment & brust through the sediment when the water heats up & consequently, creat sound. You can easily get rid of this issue by desclaing the sediment.

      However, if you have no experience about plumbing, it’s better to take help from a professional to do the task.

      Best of luck!

      Reply

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