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Old 06-04-2019, 01:34 PM   #1
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Back to the fridge problem

I'm read lots of posts on fridge not operating on propane.

So far: I've verified it operates fine on AC.

I've lit all three burners of the stove on high and plenty of gas.

Checked the lower access panel- all looks clean, removed the screw holding the burner cover- and there I'm stymied, there isn't room to remove it. So I can't see the flame (if there is one). There is weather-stripping on the inside of that hatch but even without it I"m not sure there is room to remove that cover. I decided to cool it back down on electric and then turn it back to propane and see what happens, and when it is dark, maybe I can see a flame or not.

There is a pressure test valve but I'm not sure how to use it- some posts mentioned releasing the pressure there but again, not sure how.

Here are a couple of pictures. The diagram, and my own system. And yes, I did try removing it with that screw completely out, it is sitting there now for safekeeping.

It may be just trouble-shooting as if the burner opening is clogged I"ll have to get someone to clean it- I'm not at all confident that I have the fine-motor skills to remove and reinstall it in a small space.
Attached Images
File Type: jpg Dometic diagram.jpg (109.4 KB, 55 views)
File Type: jpg IMG_4813.jpg (198.7 KB, 36 views)
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Old 06-04-2019, 02:20 PM   #2
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If the flame is on you should be able to hear it. Stand near the burner, have someone turn it on on gas. You should hear the igniter attempting to light the gas (ticking sound), if it lights you'll hear the whoosh of the flame. Last I knew it would try a few times then stop and give you an error.
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Old 06-04-2019, 02:33 PM   #3
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You don't say which model Dometic fridge you have. They ain't all the same. With the shield removed you absolutely should be able to see if there's a pilot light. If the stove pipe going up in back is hot to the touch you know the pilot light is working. If not, check the gas pressure adjustment at the regulator attached to the propane tanks. (Don't change anything there if you are clueless.) I replaced my regulator. I also gave a short blast of canned air into the orifice sleeve, and getting a Whoosh confirmed the gas was getting through to the pilot. A tiny spec of anything can block gas passing through the orifice.

If trying any of this exceeds your confidence level your best move may be the nearest RV shop.
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Old 06-04-2019, 02:39 PM   #4
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Originally Posted by MyronL View Post
You don't say which model Dometic fridge you have. They ain't all the same. With the shield removed you absolutely should be able to see if there's a pilot light. If the stove pipe going up in back is hot to the touch you know the pilot light is working. If not, check the gas pressure adjustment at the regulator attached to the propane tanks. (Don't change anything there if you are clueless.) I replaced my regulator. I also gave a short blast of canned air into the orifice sleeve, and getting a Whoosh confirmed the gas was getting through to the pilot. A tiny spec of anything can block gas passing through the orifice.

If trying any of this exceeds your confidence level your best move may be the nearest RV shop.
It's on the diagram- RM2354. I can't remove the shield. I can't see if there is a light in the daylight so will have to try looking at night. It appears the cover needs to slide straight back towards the edge of the compartment and there isn't room. (Should I rip out the weather stripping there?)



I seem to have plenty of gas pressure- I can run the furnace or all three burners of the stove (have not tried both at once.)
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Old 06-04-2019, 02:43 PM   #5
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Originally Posted by padlin View Post
If the flame is on you should be able to hear it. Stand near the burner, have someone turn it on on gas. You should hear the igniter attempting to light the gas (ticking sound), if it lights you'll hear the whoosh of the flame. Last I knew it would try a few times then stop and give you an error.
I can get someone to do that later today. I do hear it from inside and it never gives an error- just doesn't cool.
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Old 06-04-2019, 03:18 PM   #6
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I have a different fridge, yours may differ as far as errors go.
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Old 06-04-2019, 05:39 PM   #7
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Bobbie54, if you look into the opening of housing you can see where the burner jet is aimed at a 3/8 inch hole. Beyond that hole and a little above, is another 3/8 inch hole in the next piece of shield. The flame can be seen through that second hole.

I’ll try to remove the shield on my burner, same model as yours, and report back.
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Old 06-04-2019, 06:02 PM   #8
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The shield came out without much trouble. It slides toward the opening in the hatch, then pull it toward the back of the trailer and up. No need to remove the weather stripping. Sorry, no video.
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Old 06-04-2019, 06:43 PM   #9
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Oh man, you have my sympathies. I just went through a year of diagnosing a frigerator problem. It would light, cool down, and then at some point stop working. Usually after traveling down the road. Four service technicians....clean the orifice and said the flame was okay and operating. It was. But...at some point the dam thing would stop cooling. I could see the flame, but it was not big enough to get the frig cold enough. I replaced the gas manifolds at the cylinders thinking they were clogged. Worked for 6 hours and then same thing, flame there but not enough to cool. I then heard that oil or whaterver migrates from the tanks into the system and may be settling in low spots. I unhooked the gas line and gave it a shot of compressed air. Guess what? Everything stopped worked so I assumed I had shot the oil or whatever into the electronic regulator and plugged the gas line. Oh...I was told by service technician that the furnace and stove will operate as they require a higher gas volume than the frigerator. So if you have a plugged line, it will affec the frig first. But...I plugged up the lines at the regulator on the frig. Moral of the story, I spend $500 on regrigerator repair technicians doing the same dam thing with cleaning the orifice. I pulled the plug on them and just bought a new refrigeratory for $900 bucks. Wish I'd have done that in the first place.
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Old 06-04-2019, 08:20 PM   #10
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Originally Posted by Viajante View Post
The shield came out without much trouble. It slides toward the opening in the hatch, then pull it toward the back of the trailer and up. No need to remove the weather stripping. Sorry, no video.
I can get the left side to move but so far not the right side or slide it back. Not sure what hole I should be able to see through as it doesn't have any. It has a flap on the left I can see through but not the one on the right.

I turned it on after cooling on electric and went out and listened to the ignitor. Lots of clicking, then another noise (but not a whoosh like gas igniting) and when I went inside, light had come on for propane. But no idea if it is cooling and still can't see a flame. But will try again on removing the cover and worst case, look at it after dark tonight and see if there is a flame and what color.
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