Dometic RV furnace red light flashing

The red light on your Dometic RV furnace indicates that the furnace has malfunctioned. It could be due to a number of different causes, including power supply problems or faulty thermocouple wiring.

What repairs might be necessary

In some cases, the cause of the red light flashing on your Dometic RV furnace may be complex and require professional repairs. Depending on the severity of the issue, it could involve replacing parts such as thermocouples or electronic components. In more extreme cases, there may also be a need to replace the entire unit in order to ensure proper functionality.

Troubleshooting the issue

If the red light is blinking on your Dometic RV furnace, it’s important to troubleshoot the issue as soon as possible. To do this, start by checking if there is any power outage in your area or if there is an issue with your electrical connection. If you’ve ruled out these issues and the red light continues to blink, move on to inspecting key components of the furnace such as the thermocouple wiring or any other electronic parts for signs of damage.

Replacing faulty parts

If you have identified any damaged components, it’s important to replace them with new ones as soon as possible. To ensure the best performance and safety of your furnace, it is recommended that you use genuine Dometic replacement parts. It’s also a good idea to check if there are any manufacturer updates available for the unit that may help resolve the issue.

Testing the furnace

Once all faulty parts have been replaced and/or updated, it’s time to test your RV furnace. Make sure to follow all safety protocols before turning on the unit, such as opening all windows or venting areas in order to properly circulate air within your RV. After turning on the furnace, wait a few minutes and check if the red light has stopped blinking. If it hasn’t, you may need to call in a professional for further assistance.

How to troubleshoot the issue in the future

To prevent similar issues from occurring in the future, it’s important to regularly inspect your RV furnace for any signs of damage or malfunction. Make sure to clean and replace filters as needed and check all connections on a regular basis. It is also recommended that you regularly run diagnostic tests on your unit to ensure that it is in good working condition. With these simple maintenance tips, you can help keep your Dometic RV furnace running smoothly for years to come.


Dometic RV furnaces are designed to provide long-term performance and reliability. If you ever experience an issue with your unit, make sure you troubleshoot it promptly and take necessary steps like replacing damaged parts or running diagnostic tests to identify any underlying problems. With regular maintenance and proper care, you can help keep your Dometic RV furnace running smoothly for many years.

By properly addressing the red light flashing issue on your Dometic RV furnace, you can help ensure its safe and efficient operation for years to come. With the right troubleshooting steps and maintenance tips, you can get back to enjoying a warm and comfortable RV experience.

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