Fridge Problem with Gas - Fiberglass RV
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Old 07-31-2022, 07:33 AM   #1
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Fridge Problem with Gas

We have a 2016 Dometic RM2620RX (Classic) fridge that we use about 99% of the time on shore power. Ahead of our upcoming trip, I decided to try the fridge out on gas in case we needed it at some point. I did all the preliminary steps of lighting the stove to clear the line and checked to make sure the gas valve was in the open position in the fridge compartment. After turning the fridge control to gas, I hear the valve open and very faint clicking from the lower control board as the igniter tries to light the gas. Watching the burner area, there is no spark at the end of the electrode. Moving the electrode closer to the burner, it will weakly spark a bit but not light the gas. Of course, the gas valve times out and I start over. The burner will light manually with a long grill lighter. I installed a new electrode/wire with no difference. It just seems the spark is too weak to ignite the gas. (By the way, after lighting it manually, it will operate and cool well for several hours, but then shut off.)

This control board has the re-igniter soldered on, so I can’t just replace it. Does it sound like a control board replacement is next? Anything else I missed? Ideas?

(Strange…my profile is showing our UHaul VT from 6 years ago. We have a Bigfoot Silver Cloud.)
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Old 07-31-2022, 09:56 AM   #2
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I would start by cleaning the orifice and the chimney. If you have access to a microscope you can examine the orifice. I had a small piece of dirt blocking mine that alcohol would not touch. Despite the warnings about not cleaning it manually, I used a piece of 6 lb test fishing line to remove the dirt. The performance improved greatly after that.
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Old 07-31-2022, 12:57 PM   #3
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I'd use some fine grit sandpaper to clean off the sparker. They can get oxidized a bit, especially if not used in a long time.
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