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Tech Tip: Decalcifying Your AquaGo

Tech Tip: Decalcifying Truma AquaGo

More often than not, the water running through your RV’s water heater is going to be “hard water,” or water with a high mineral content. With a tankless water heater, like the Truma AquaGo, there are a lot of small spaces where calcium and other mineral debris can accumulate during regular use. Since you probably aren’t lugging around a residential water softener in your RV, this debris will start to build up and begin to affect the performance of your water heater. This is something we kept in mind when we developed the Truma AquaGo. It is the industry’s first water heater that can be decalcified using the semi-automated “Clean” mode.

Regularly decalcifying your Truma AquaGo will maintain performance quality and help extend the life of the appliance. We recommend decalcifying after every 1,585 gallons (6,000 liters) of water used. For low to moderate usage, this will be an annual task. For high usage, especially with harder water, you may find you need to decalcify more frequently. This is completely normal.

Truma AquaGo Decalcification tablets and pacakge

To make this routine maintenance task as easy as possible, we have developed decalcification tablets that can be inserted directly into the AquaGo water inlet filter located behind the bright yellow “Easy Drain Lever.”

One package of decalcification tablets is enough for one cleaning cycle, so there is no measuring, guessing, or waste. You can get yours directly from Truma on Amazon.

We’ve put together a guide for depressurizing and decalcifying your Truma AquaGo, with instructions for both the analog AquaGo dial and the Truma CP plus control panel. Two things to keep in mind before you get started:

  • You will want to perform the decalcification process while hooked up to city water — the cleaning and rinsing process uses quite a bit of water, and you won’t want to run out in the middle.
  • Remember: for your safety, the cleaning process cannot be stopped once it begins! This process can take up to three hours, start to finish, so make sure to give yourself plenty of time.

You will find full instructions here: Download Center

Our friends at The Fit RV also put together a video tutorial for Decalcifying with the Truma CP plus:

Once you have completed the decalcification process, you should be able to operate your Truma AquaGo as usual. If you find that your system has become “stuck” in Clean mode, follow these steps:

  1. The Truma AquaGo must have power from the main panel.
  2. The outside toggle switch on the AquaGo needs to be in the “On” position.
  3. Turn the analog dial to “Clean” mode (this is the bottom position on the dial).
  4. Wait until you hear the circulation pump cycle on and off. You may need to “wake the dial up” by turning it on and off a couple of times until you hear the circulation pump cycling.
  5. Open a hot water faucet, let the water run until the amber light on the analog dial stops flashing. This could take 15 minutes or more. During this time, you will hear the circulation pump turning off and on intermittently. This is normal and the burner will not ignite.
  6. Once the flush cycle is complete, the green LED above the toggle switch on the outside of the AquaGo will go off. You will see a red LED light fault code below the toggle switch. This is fault code 31 (S,S,S, L,L,L,L,L) “Decalcification Complete.”
  7. Turn the toggle switch on the AquaGo to the “Off” position.
  8. Go inside and turn the analog dial to the “Off” position and wait 30 seconds.
  9. Turn the analog dial to the “ECO” or “Comfort” mode. You may need to “wake the dial up” by slowly turning it on and off a couple of times. The unit should work normally at this time.

If you have any questions about your Truma AquaGo or need assistance form a certified service technician, please contact