Dometic 8501 refrigerator not working on propane

[Jwwiff]

I have a ‘09 Fleetwood Avalon that has the Dometic RM 8501 3-way refrigerator installed. It works on AC and DC (verified by switching modes and looking at current draw) but not on propane. It has the MES control panel (manual energy selection) and when I switch to propane, the propane and fault LEDs light up indicating a fault.

Through the control, I put it into service mode and go through all the modes and in the gas mode, the burner lights without hesitation and operates as it should ….. go figure. Go back to normal operating mode and the gas and fault LEDs light up again.

Anyone with ideas out there? I’m about out of good ones…….

 

[Sjm9911]

Not sure about your fridge. But if it works on ac and dc, it has to do with the gas side. Is the flue clear? Do newer fridges have a rollout switch? I saw the biggers ones have them.

 

[Jwwiff]

No rollout switch on this one that I could see. I will look further. Like I said, it works in service mode but in regular mode never starts and throws the fault light immediately. Thanks for your comment.

 

[Jwwiff]

Further information…. Here is the Dometic schematic - note that the wire colors are different on each end. The GFA end is positionally correct and I read ~1.5V across pins 7 and 6 which leaves pin 5 as the fault line going back to the main control board. That one reads ~.43V, same as the voltage going to the coils. The schematic labeling on the main control board on the schematic x110 connector don’t match the GFA end.

Which one is right????

Again, the GFA seems to work, the igniter, ionizer, and signals to the valves work. When I pull the ionizer from the GFA, it shuts off the valves.

I’m at a loss as it what is going wrong. Any more suggestions are appreciated.