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Dometic 3 way and stove issues.


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#11 muttmaster

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Posted 03 October 2019 - 07:00 PM

Thanks Old Crow for link to Dometic diagnostic manual! I will dive into it later. It will save me loads of cash!
Steve, I have run the fridge on ac and on Honda generator and works fine. On dc, it works too. Faint light on check, auto and dc indicators only on gas mode. I will follow up on low voltage issue as you suggested thank you.
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#12 muttmaster

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Posted 04 October 2019 - 11:14 PM

After reading the diagnostic manual, and followed all 9 potential causes as best as I could with limited equipment and knowledge, I may have found the culprit. The Thermocouple is reading around 13 millivolt when it should be 22-36 range. Most symptoms I have being experiencing is in section 7.3, page 20. Erratic operation is the buzz word! Ordered one Dometic 2932781012 off Amazon for $29, and hope it is the right one. If looks the same as mine...too lazy to call Dometic and wait for parts list, etc.
Thanks all again for steering me to the right direction. Saved me a few bucks for sure, and I hope it will help others in the future. Oh yes, watched Utube on the subject too...very helpful.
Also, ordered a Dometic cfx35 off EBay. I had a good excuse to get one.

Edited by muttmaster, 04 October 2019 - 11:40 PM.

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#13 muttmaster

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Posted 05 October 2019 - 02:53 PM

Corrections on thermocouple, what I ordered was the electrode, not the thermocouple, apparently my model does not have a thermocouple. I will have to call Dometic to confirm. I did take the millivolt reading across j4 and j10 re page 20 of the manual section 7.3 under thermocouple.
OC, thanks for pointing out my mistake(s).
Good thing I have a compressor fridge on the way.
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#14 muttmaster

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Posted 15 October 2019 - 12:06 AM

Update: fridge working fine after adjusting the level of the thermistor inside the fridge, didn’t need the electrode after all. I cleaned and blew out dust in and out of burner. Also adjusted the propane regulator two turn clockwise. It helped with the stove flame level. I know I should of adjusted it with manometer but I have a new one coming from 4WC, so I thought to experiment a bit. I told Jay from 4WC that I was at 7500 feet and he informed me the propane system usually is affected at 9000’. Suggested trying a new regulator that is set at 12” Water Columns at the factory.
I should of ordered a new pigtail too from him but later learned the 18” pigtail is “custom” made specific for 4WC. Called Fairview, GasFlo, etc. what a pain. There were a bit of oil at the end of Acme knob, nothing flowing out, just a smidget. My local propane guy said it could be from the additive that gives the gas the odor. Apparently there is a ball bearing in the pigtail that easily gets plugged by oil.
I also learned that my new Dometic CFX 35 needed a “break in” period before it can cool down to -8 F. At first, it only went down to 2*F. Called Dometic, service centers. Etc. what a pain. It is working ok now but the thermostat on the cooler may be off by 10*F. It is freezing water bottles for now over many hours. Not as fast as I had hoped. Worked better on AC than on DC.
Thanks, OldCrow again for all the sagely advise.
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