Help fridge not working

[Hymerbell]

The flame doesn’t have to be very big, as long as it encloses the flame failure sensor/s. If the flame is sustaining, then you may have a blockage in the flue. You might be able to get to the top of the flue via the upper grill. On mine there is a cowl, secured with a screw that would need the motorhome body removing to undo!! You can feel the heat from the flame, however, after a while of running the fridge. If you can’t feel any heat at all, you may have a blockage in the flue. If you have access to an airline, you could try removing the burner, and blasting air up the flue, which might dislodge whatever is blocking it.

If the flue is working properly, then you may have to revert to the ultimate ‘fix’ - take the fridge out, and turn it upside down (or maybe just on it’s side - never had to do it myself, but you will find plenty of references here if you search the forum) for a few hours, then replace it, and it should work again!!!

probably the jet if youve got a small flame

My fridge started defrosting on a THS last year. I popped the vent cover and there was a small blue flame present, I was expecting to see a feeble yellow flame if the problem was gonna be gas related. Decided to whip the jet out anyway as there was the obligatory pile of rusty dust under the burner. The jet and burner didn't look too bad, but when I nailed it all back together, the flames was at least twice as large and more importantly, it was making its familiar "roaring" sound. Fridge was working fine after that.

Well finally got to the boiler...got a flame but not as we know it Captain...Very small and certainly not roaring....what the big cylinder abovevtge plastic container ? The fridge works fine on 12v and 240v. Someone told me a fridge gets even colder in gas...but not mine.

 

[jockaneezer]

That burner unit looks quite new, wonder if it has played up with the previous owner ?It would still be worth undoing that hex nut at the left hand end of the burner and check the jet that's in there. The little unit with the wires going to it below the Dometic label is the gas solenoid and you have to assume it's working ok or the gas wouldn't light at all. Is the cylinder the black thing with the rusty lug on it ? I reckon its just part of the cooling mechanism ?

 

[Hymerbell]

That burner unit looks quite new, wonder if it has played up with the previous owner ?It would still be worth undoing that hex nut at the left hand end of the burner and check the jet that's in there. The little unit with the wires going to it below the Dometic label is the gas solenoid and you have to assume it's working ok or the gas wouldn't light at all. Is the cylinder the black thing with the rusty lug on it ? I reckon its just part of the cooling mechanism ?

Well took out the burner...gave the jet a good blast of air...put it all back together and now it’s roaring like Battersea Power Station...icy cold for my beers...thanks everyone...

 

[newtonz]

The gas supply to the burner nozzle on my Dometic regularly dwindles or stops, and I have to clean it. Referring to Larby's photo, you can see the gas pipe connecting to the end of the square section pipe which has the air inlet holes and the burner nozzle, igniter, thermocouple at one end. If you carefully undo the nut holding the pipe, there is a very small disc orifice plate (like a sequin) trapped between the end of the pipe and the manifold block inlet. This has a tiny hole which can get blocked with dust or metallic debris. I shake/brush any dust out of the manifold and carefully clean the orifice hole. The size of the hole is important, so clean it carefully! I find the bronze wire from around some wine bottles works well . I also clean the inside of the square pipe, and the cross air holes if they seem corroded ( a hand-held loose-fitting drill bit works).
Take good care that the little disc doesn't fall out and roll to some inaccessible place as you undo the nut - I lay a polythene bag across all the base underneath.

 

[mossa]

In Portugal on way to morocco thermo coupling not working burnout ? It’s a dometic mod no rm 7505. Product no 921 17 92-20 dometic do not make parts for this model anymore. Can any one help please


RM 7505. Prouduct no921 17 92-20 domestic

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[mossa]

In Portugal on way to morocco thermo coupling not working burnout ? It’s a dometic mod no rm 7505. Product no 921 17 92-20 dometic do not make parts for this model anymore. Can any one help please


RM 7505. Prouduct no921 17 92-20 domestic

We had a problem with ours which worked when we used electric but wouldn’t fire up on gas , phones dealer and he gave me these instructions.
Have you tried resetting the the fridge you either turn it off holding the button down for a length of time and it should reset , if not try holding it down when turning it on .

 

[MobyDick57]

We had a similar issue and the Dometic engineer in Spain told us that it was a sensor on the control panel between the freezer and the fridge. He told us the problem is damp from using the gas selection for more than 3days! He suggested that we turned it to 12v for half a day every 3 days. Possible solution for an active problem was loosen the control panel and use a low heat hairdryer from a reasonable distance to dry the panel. Hope this possibly helps

 

[gwyntaxi]

Funny thing is...the bit in the right in this picture from top vent feels slightly warm to the touch...so something must be happening..on my old Hymer when I put it on gas I heard the boiler try to fire up..but can’t here anything in this van ☹

View attachment 394794

I think that with your knowledge of how to identify which bit is the flue I would say the job is best left to a Mobil service engineer, no offence intended but we are dealing with agas appliance here and if you’re not sure about what you’re doing best leave it toa professional, seen to many vans catch fire from poor fridge repairs.

 

[Hymerbell]

I think that with your knowledge of how to identify which bit is the flue I would say the job is best left to a Mobil service engineer, no offence intended but we are dealing with agas appliance here and if you’re not sure about what you’re doing best leave it toa professional, seen to many vans catch fire from poor fridge repairs.

Ooh err....too late...fixed it