Dometic 3 Way Fridge Problems

The Dometic 3-way fridge, a popular choice among caravanners and campervan owners, is renowned for its versatility. As the name suggests, it can run on three power sources: battery, mains electricity, and gas. However, users occasionally report issues, particularly when trying to operate it on gas. Here’s a summary of these issues and the solutions users have proposed:

1. Ignition Issues

Problem: No spark when trying to light the fridge on gas.

Possible Causes and Solutions:

• Debris/Scale Accumulation: If the fridge hasn’t been used on gas for a while, debris or scale might have fallen onto the ignition point from the flue. Cleaning the ignition point is often an easy fix. This can be done by removing the small metal box surrounding the burner at the bottom of the flue and cleaning the debris/scale.
• Flat Ignition Battery: Some models come with a small battery in the ignition system, usually an AA type. If this is flat, it might not produce a spark. Users should check the instruction manual or search online for replacement instructions.
• Leisure Battery Issues: Some fridges derive ignition power from a leisure battery rather than an independent fridge battery. Ensure that the leisure battery is fully charged; a partly charged one can produce a weak spark, leading to ignition failure.
• Air in the Gas Line: Especially if the fridge hasn’t been used on gas before, there could be air in the gas line that needs to be expelled. Lighting a gas ring can help draw gas through the system. Continue trying the fridge ignition until it lights.

2. Operational Concerns

Problem: The fridge works on battery and mains but not on gas, even though the igniter and flame seem to be functioning normally.

Possible Causes and Solutions:

• Gas Issues: Ensure the gas bottle isn’t empty, the supply cut-out device is open (isolation tap), and there isn’t any air in the gas pipe. Misaligned burners or a defective thermocouple could also prevent the fridge from operating on gas. Some users have also found switching from butane to propane to be beneficial as butane is considered a “dirtier” gas that can cause more issues with the jets.
• Cooling Delays: Remember, these fridges can take several hours to cool down. Check for signs of operation like a cold metal plate in the freezing compartment or warmth above the radiator at the back.
• Resetting the Fridge: Some models, like the Dometic RMS 10.5 X’s, come with a reset option. If there’s a fault light when trying to run the fridge on gas, pressing the power button until it beeps once and then quickly releasing it can reset the system.

3. General Tips

• Always check for basic issues first, such as a plastic cover left on the flue outlet.
• If in doubt, consult with an engineer. There are many certified professionals who specialize in caravan and camper equipment and can offer valuable insights.
• Regular servicing of the caravan or campervan can help identify and rectify fridge issues early on.

In conclusion, while the Dometic 3-way fridge is an impressive piece of equipment, like any appliance, it can run into problems. However, with some knowledge and the right approach, many of these issues can be easily resolved.