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Old 03-01-2012, 10:01 AM   #1
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1976 31' Sovereign
1963 16' Bambi
1971 21' Globetrotter
Marbletown , New York
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Furnace Problem

I guess that the Furnace is a common subject. I installed a new furnace in my 1976 Soverign about 2 years ago. It worked fine for about a year. The problem was a bad board which I understand happens often. I took it to a Suburban dealer that was a member of the recommended dealers. He changed the bad stock board with a Dinasaur board. That worked fine until 2 days ago. 1. I have 2 full propane tanks, 2. it worked for about one hour and then quit. 3. I turned the thermo. to off and waited 1/2 hour then turned it on again. Nothing happened - not even a click. I tried it again, nothing. 4. I "jumped" the thermo - nothing. 5. Although I don't think it matters I checked all breakers and fuses and they were OK. 6. All of the 12V stuff works.

It seems as though the unit is not getting any power. It was running that morning and nothing had changed when I realized there was no heat.

Anyone got any thoughts. the Forum has always been helpful in the past,,,Help!
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Old 03-01-2012, 10:12 AM   #2
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Check for 12 volts and a good ground at the plug which plugs into the furnace (if yours has that plug) prior to doing anything else. If no plug on your furnace, check for voltage at the white and black (possibly red) wires which probably come out of the wall in that location. AS usually used blue wire for the thermostat lines. Then report back and maybe someone can let you know the next possible step.
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Old 03-01-2012, 10:54 AM   #3
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furnace problem

I am very interested in this post because I am experiencing the same thing with my AS Bambi 19' 2006. No fan or heat. Hydro flam corp (mdl 7916-11) had me check the voltage on two white wires connected to each other mounted just behind the circuit board. I had 12 volts and he said I shouldn't have anything. He sending me a switch that controls the fan coming on and the heat kicking in. I am sorry I didn't get the name of the component. I just returned from a trailer dealer (not AS), and they said the entire furnace will have to be pulled to change the "relay." I hope you can use any part of this note and someone/anyone let me know the difficulty in changing the component. Tom
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Old 03-01-2012, 11:01 AM   #4
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This may sound crazy, but take a pencil eraser and clean the connector contacts on the control board at the furnace and the contacts in the connectors if possible. Some times a thin film will build up on PC boards and needs to be removed.
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Old 03-01-2012, 11:32 AM   #5
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Stone Ridge, mocus,

There are many possible sources of problems like this, chief among them the 12 volt supply, grounding, fan relay, fan motor, sail switch, and loose or shorted connections on any of those components as well as the high limit. It isn't safe to troubleshoot these things unless you have experience with appliance or electronics repair or are working under the supervision of someone who does.
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Old 03-01-2012, 12:10 PM   #6
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I tried Rebee's suggestion to no avail. Thanks for allowing me to come in on this posting.
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Old 03-01-2012, 07:30 PM   #7
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1976 31' Sovereign
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Thanks for all of your input. I'll try to check these things out tomorrow. I'll get back to you.
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Old 03-01-2012, 07:30 PM   #8
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The dino boards do have a small ATO fuse on board to protect it from power spikes. Might be worth checking that.
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Old 03-02-2012, 11:44 AM   #9
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2006 19' Safari SE
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Smile furnace problems (past history)

Might I add to this some information passed on to me to check first, before I took mine to the shop. If you have a CCC thermostat, turn it off, push in the "zone and mode" buttons at same time, turn the unit on holding the buttons down for 5 seconds. Select "furnace" by pushing the mode switch to furnace, set your temperature high enough for the unit to kick on. Walla.....worked like a charm for me. There are great people in this forum and I have been corresponding with one of them. (If your trailer has been without power, battery or shore for any length of time.
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