Fix Your Truma Water Heater: Reset Button & Troubleshooting Tips

Experiencing a cold shower when you’re expecting a warm one is never pleasant. If you’re using a Truma water heater and it’s not performing as it should, it’s likely you’ll need to locate the reset button. This small but crucial component is your first line of defence in troubleshooting and getting your water heater back in action.

Understanding how to properly reset your Truma water heater can save you time and hassle. In this article, you’ll discover where to find the reset button, how to use it effectively, and what steps to take if a simple reset doesn’t resolve your issues. Keep reading to ensure your next shower is as warm and welcoming as you expect.

Finding the Truma Water Heater Reset Button

When it’s time to get your Truma water heater operating smoothly again, locating the reset button is your first step. It’s typically concealed to prevent accidental resets but is accessible enough for when you need it. You’ll find the reset button located on the heater itself, often behind a panel or cover.

In most models, look for a small, red button, typically near the thermostat. The cover might be labelled, or it might require a gentle prying with a screwdriver. Remember, safety is paramount, so ensure that all power to the unit is completely turned off before you begin this process.

Once you’ve located the button:

  • Turn off your water heater.
  • Remove the cover or access panel.
  • Press the red reset button firmly.

After pressing the reset button, wait a few moments before turning the heater back on. This allows the internal circuitry to clear and reset fully. Power up the water heater and test for normal operation. If the water temperature is not sufficient or the heater fails to function, further investigation or professional assistance may be necessary.

Troubleshooting with the reset button often solves common issues, but if problems persist, it suggests a deeper underlying issue with your Truma water heater. Continual resets are not a sustainable solution and proper maintenance is advised to prevent future disruptions in your water heating system.

Resetting the Truma Water Heater

Before resetting your Truma water heater, ensure the appliance is cool and not in operation. This ensures safety and prevents any potential damage during the reset process. Wear protective gloves if you have sensitive skin or if the panel has sharp edges.

To reset your Truma water heater:

  • Locate the reset button. It can typically be found behind the heater’s exterior panel. You may need a screwdriver to remove this panel securely.
  • Once the panel is off, look for a small button or pinhole marked ‘Reset’.
  • Press the reset button firmly. If your model has a pinhole, use a pin to gently press the button inside the hole. You should feel a click which indicates the button has been engaged.
  • Replace the panel and secure it back in place.
  • Turn the heater back on and check for normal operation.

Remember, if the water heater trips frequently, this could be a sign of underlying issues. Persistent problems may include faulty heating elements, a malfunctioning thermostat, or sediment buildup causing overheating. If a reset fails to solve the problem, consulting the user manual or contacting a professional technician for a thorough inspection is essential.

Regular maintenance of your Truma water heater is key to preventing future issues.

Maintenance Tips

  • Regularly check and clean the exhaust vents.
  • Periodically drain and flush the tank to remove sediment.
  • Inspect the anode rod at least once a year and replace it if worn out.

By following these maintenance steps, you’ll ensure your Truma water heater operates efficiently and has a longer lifespan. It’s also recommended to schedule an annual professional inspection for optimal performance.

Troubleshooting Issues After Resetting

When you’ve followed all the steps to reset your Truma water heater but still experience issues, it’s crucial to troubleshoot effectively. Immediate problems after a reset could indicate a deeper underlying issue that needs addressing.

Check Error Codes

Most modern Truma water heaters are equipped with a diagnostic system that displays error codes. Refer to your user manual to decipher these codes. They can reveal problems such as:

  • Faulty ignition sequences
  • Inadequate gas supply
  • Ventilation troubles

Understanding these codes is essential. They guide you on what steps to take next and whether you’ll need to clean, repair, or replace components.

Inspect Gas and Power Supply

Ensure your gas supply is turned on and that the heater is properly connected to the power source. A common oversight is the gas valve being left closed after maintenance.

Listen for Unusual Noises

Sounds like popping or whistling can signal sediment build-up or a misaligned burner. Addressing such issues often requires technical expertise.

Assess Water Pressure

Low water pressure might prevent your heater from functioning optimally. Check for any closed valves or obstructions in the lines and rectify them accordingly.

Seek Professional Help

If you’ve worked through these steps without success, it’s time to call in a professional technician. They’re trained to identify and resolve complex issues that go beyond basic troubleshooting.

Remember that regular maintenance is key to avoiding these disruptions. Keep your Truma water heater in top condition to ensure you’re never left in the cold.

Additional Steps for Resolving Persistent Problems

When your Truma water heater is still acting up after a reset, it’s time to delve deeper. There’s a range of checks and fixes you can engage in to troubleshoot further.

Inspect the Burner

A dirty or malfunctioning burner can cause your heater to fail. Ensure there’s no debris blocking the burner and that it ignites properly. If you’re unsure, it’s best to clean the burner or have it checked by a professional.

Examine the Water Lines

Issues often stem from the water lines:

  • Check for kinks or bends that could restrict water flow.
  • Ensure the lines are free from blockages or frozen in colder weather.

Electrical Connections

Faulty electrical connections can also be a culprit:

  • Secure all wiring and check for corrosion.
  • Verify that the control board is functioning correctly.

Ventilation Check

Proper ventilation is crucial for the heater to operate safely and effectively:

  • Clear obstructions from vents to prevent carbon monoxide build-up.
  • Ensure flue gases are venting out adequately.

Dive into the Manual

Sometimes the answer lies in the details:

  • Refer to your heater’s manual for specific troubleshooting steps.
  • Check for any additional reset procedures or diagnostic modes.

Remember, if you’re not confident in assessing these elements yourself, it’s wise to seek assistance from a certified technician. Regularly servicing your Truma water heater decreases the likelihood of persistent issues and helps maintain a reliable source of hot water for your travels.


You’ve now got the know-how to tackle issues with your Truma water heater even after hitting the reset button. Remember to keep an eye on the burner, check those water lines and electrical connections and don’t overlook the importance of ventilation. Regular maintenance is your best defence against future disruptions. And if you’re ever in doubt, don’t hesitate to call in the experts. Stay proactive and your water heater will continue to serve you well, providing that steady stream of hot water you rely on every day.