I'm new to the forum, and new to RV'ing. My wife and I bought a vintage 1979 Dodge Diplomat 23 foot class C vehicle a few months ago ...with only 40,000 miles on it!! It's a real time capsule, well maintained and runs just fine. Everything is original, including the Dometic RM660 three-way fridge. I've been struggling trying to get the fridge up and running. I've done all the suggested things: cleaned the burner (its working fine now ...nice blue flame); checked all the electrical stuff, etc., etc.; even removed the fridge and 'burped' it a few times (even though the 'experts' say that makes no difference). I could hear the refrigerant gurgling through the pipes. Here's the present status: on 12v and 120v the heater warms up, but doesn't seem to get hot enough to circulate the refrigerant. (again, the 'experts' say the 12v and 120v heaters are a 'no work' or 'work' situation ...either get hot, or don't even get warm, so 'getting warm' puzzles me). The propane heater works much better: seems to be circulating the refrigerant nicely; can hear it gurgling thru the pipes, and the tubes at the back (bottom part that I can reach) get hot enough that I can't leave my hand on them for more than 20 sec or so. However, the fridge does not get cool inside ...its actually about 10 degrees warmer than the temp outside the fridge. I've left it running on propane for more than 12 hours ....no cooling. So ....not sure what to do next? Getting the current fridge repaired at a professional shop, or replacing it with a new one are 'options of last resort' as either would likely double the value of the old RV !! One option I'm seriously considering is replacing it with a small 120v 'bar fridge' (1.7 or 2.2 or 3.3 cu ft) that could possible be operated off an inverter so I can use it while the RV is moving. Any helpful comments or suggestions are welcome.