If the Truma heater in your motorhome does not ignite, this is particularly critical when it is cool outside and you need a heater. A functioning heater is essential for your comfort and safety when C-Class.
Recognising ignition problems
Ignition problems with your Truma heater can be indicated by various signs. A common problem is that the heater cannot produce a gas flame, which affects both comfort and safety when camping. Typical symptoms are error messages on the control panel, no ignition noise or a strong odour of gas.
These problems can occur with various models, for example with the Combi series
Possible causes at a glance
- Elektrik: A missing 12V supply or a flat battery will interfere with the ignition mechanism and prevent the heater from starting correctly.
- Versorgung: Problems with the gas supply, such as a blocked line, an empty gas bottle or a closed valve, can prevent the flow and interrupt the ignition.
- Umwelt: External factors such as unfavourable weather conditions or severe temperature fluctuations can affect the performance of the heater and lead to ignition problems.
- Security systems: The Duo Control system may have activated the crash sensor, making ignition impossible.
Solution approaches
If there are ignition problems, the Truma heater will display an error message on the control panel in most cases. This will help you to recognise the specific causes and react in a targeted manner.
- Error code E517H: This code indicates an interrupted gas supply or overheating. Check that the gas bottle is open and sufficiently filled. Make sure that all gas valves are open and the power supply is connected correctly. Wait about 15 minutes and confirm the error on the control panel. If necessary, carry out a reset directly on the heater.
- Fehlercode W255H: This code indicates an interrupted power supply or faulty communication between the control panel and the heater. Check the 12 V power supply and all fuses. Also check the data cable (TIN cable) for tight fit and possible damage. Once the connection has been restored, the error should disappear automatically.
- Other error messages: The control panel can display additional error codes that indicate various problems. Consult the operating instructions to understand the meaning and find suitable solutions.
Irrespective of the error messages, the following general measures should be taken to rectify ignition problems:
- ensure electrical and gas supply: Make sure that all electrical connections of the heater are firmly connected and the battery is fully charged. Check the gas bottle for sufficient filling levels and open all valves completely to avoid blockages or leaks. These simple steps will help to guarantee the energy and gas supply and keep the heater in good working order.
- Consider environmental conditions: Adjust the settings of your heater to harmonise better with the surroundings. In extreme weather conditions, such as severe frost, you should ensure that the heater is operated at the optimum settings to minimise heat loss. At high altitudes, the thinner air can impair the ignition capability, so care should be taken to check the gas supply carefully. If rapid temperature fluctuations occur, maintain an even heat output by continuously adjusting the temperature to compensate for extremely cold or warm gaps. These adjustments help to maintain the ignition capability of your heater and ensure efficient operation.
- Reset the security system: Actuate the crash sensor in the Duo Control system to enable ignition again.
When is professional help necessary?
If the TRUMA heater does not ignite despite all the suggested measures or if problems continue to occur, it is advisable to contact a qualified specialist company or Bürstner service partner to identify the cause of the problem and safely put the heater back into operation.
⚠️ Safety note
Always ensure a well-ventilated environment when implementing the suggested measures to avoid the risk of gas accumulation. Visually check that all gas bottles and pipes are safe and tight without carrying out any repairs yourself. Keep away from naked flames and sources of sparks when operating the heater. If there is a persistent smell of gas or if you are unsure, switch off the heater immediately, open the windows and contact a qualified professional to check the systems and provide professional assistance.
💡 Our tip
Always have a detailed checklist ready that includes the condition of the gas bottles, the battery charge and the settings of your heater. A preventive check can help to identify technical problems at an early stage and initiate the necessary measures before you set off on your journey. This guarantees a safe and pleasant C-Class experience!
This website uses automatic translations. Please excuse any errors. In case of doubt, the original German version applies.