We have a Dometic Electrolux RM4270 Gas/12v/240v fridge. We run it on gas and only use the 12v to light it.
It did not get cold. Our milk went off, our apple juice went off, our orange juice went fizzy and our bitter went rancid. We used freezer packs and kept it as a cool box for a week but this was a pain and the milk went off etc.
I enquired at a local domestic appliance repair specialist (in Bridge Street, Banbury) about repair or servicing. They supplied us the fridge in 2004 but now they do not touch them. They said I would have to get a "gas safe" man to look at it.
I popped into Tooleys' Boatyard and asked their man whether they would repair a fridge. The helpful advice I received was to clean out all the cobwebs and grot from around the flame and see if that helped. I got the fridge out of its housing cleaned out the flame chamber but found the exhaust chimney flexible connection had perished/disintegrated. Tooleys did not stock them, the repair man in Bridge street did not stock them, Sovereign Narrowboats this time came up with the helpful advice to go to a motor factor for flexible exhaust hose (available in two metre lengths). I needed eight inches at the outside. In the end I settled for corrugated aluminium tubing as used for air inlets. At only £2.99 for a metre this was a snip and I have enough to do the job another three or four times.
The fridge still didn't work. So I rang Tooley's again and talked to Matt. He told me that a gas man was coming to the yard today to do a boiler service and he would speak to him. I brought the boat down to town and waited for the gas man to arrive. When he did come (in due canal time) he asked whether the flame was alight. On received a positive reply he then said that in that case he could not help. I needed a refrigeration gas man. It had to be something to do with the fridge gas circuit. However he did say that giving the fridge a good shake or turning it upside down might do the trick!
So we tilted it all the way over one way and shook it about. Then we tilted it the other way and shook it about again. Then I put it back in its housing.
We took the boat through the lift bridge and lock, turned at Tramway, filled up with water and returned the boat to the home mooring. As I shut up the boat I felt into the fridge. It was cold! Thank you to the gas man for his advice. A good shaking may have done the trick.