Able Dog Posted November 25, 2015 Report Share Posted November 25, 2015 I have a Dometic RM 2862, Prod.# 921 1461-55, Ser.# 533 00087. For 9 years, full timing, it served me well until last week. When I noticed that the eyebrow lights were out I trouble-shot it down to the 12 VDC Thermofuse on the outside of the flue. I could reset the plunger and the frig would work for about 30 seconds before it popped again. I called Dometic and they sent a new one, which I installed..it lasted for about 30 minutes before it popped. It appears the flue temp is getting too high and shutting off the 12 VDC to the control board, which, by the way, is a new one (broke one side of the fuse holder while attempting to remove the fuse) . Any ideas as to where I should go from here? Thanks, Larry Link to comment Share on other sites More sharing options...
bstark Posted November 25, 2015 Report Share Posted November 25, 2015 Is the flue obstructed in any way? Have you an infra-red gun to monitor flue temps while operating? Today is just the tomorrow you worried about yesterday! Bruce, Sandra & Scampi cat SKP#86370 Link to comment Share on other sites More sharing options...
Able Dog Posted November 25, 2015 Author Report Share Posted November 25, 2015 Is the flue obstructed in any way? Have you an infra-red gun to monitor flue temps while operating? I'll check the flue tomorrow for obstructions, what should the temp be? Link to comment Share on other sites More sharing options...
billr Posted November 26, 2015 Report Share Posted November 26, 2015 If in park. Check temp if a functioning unit to compare. Good to see if it's way hot. Bill and Joan and 3 Collie pups 2001 Volvo VNL 770 "The Doghouse" Singled short, "ET" hItch VED12 465HP Gen 1 Autoshift 3.58 ratio 2005 Mobile Suite 38RL3 2011 Smart Passion loaded piggybacK Weigh-It Portable RV Scales http://www.weighitrv.com/ Link to comment Share on other sites More sharing options...
Able Dog Posted November 26, 2015 Author Report Share Posted November 26, 2015 I checked for obstructions this morning, the baffle strip moves freely and there was no sign of anything "nesting" in there. But...I did notice that there was some yellowish residue around the base of the flue. So I peeled back the sheet metal around the flue and exposed the insulation. The AC heating element is covered with rust/yellow powder to the point that I don't think that I can remove itfront the retainer. The yellow powder has soaked into the insulation and formed a hard barrier. Just prior to this problem with the AC element, I had noticed that the frig was having problems cooling. So I'm afraid that the frig is done for. Opinions? Link to comment Share on other sites More sharing options...
jblscooper Posted November 26, 2015 Report Share Posted November 26, 2015 I checked for obstructions this morning, the baffle strip moves freely and there was no sign of anything "nesting" in there. But...I did notice that there was some yellowish residue around the base of the flue. So I peeled back the sheet metal around the flue and exposed the insulation. The AC heating element is covered with rust/yellow powder to the point that I don't think that I can remove itfront the retainer. The yellow powder has soaked into the insulation and formed a hard barrier. Just prior to this problem with the AC element, I had noticed that the frig was having problems cooling. So I'm afraid that the frig is done for. Opinions? Yep. lost its magic ammonia Link to comment Share on other sites More sharing options...
57becky Posted November 27, 2015 Report Share Posted November 27, 2015 Do not use the fridge!! It may still have ammonia in the system, and applying heat may cause more leaking which could start a fire. You need to either, get the cooling unit replaced or a new fridge. They are not repairable. Link to comment Share on other sites More sharing options...
Able Dog Posted November 27, 2015 Author Report Share Posted November 27, 2015 Do not use the fridge!! It may still have ammonia in the system, and applying heat may cause more leaking which could start a fire. You need to either, get the cooling unit replaced or a new fridge. They are not repairable. When it popped the new Thermofuse I unplugged it. And here I thought that I didn't have anything to do today. Thanks for everybody's help. Link to comment Share on other sites More sharing options...
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