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Old 12-26-2012, 11:09 PM   #1
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Join Date: Aug 2012
Posts: 21
Morning all! As I sit in Fredricksburg, TX it's 24 degrees outside and 54 degrees inside my 26foot Hill Country.. I have the heater switch to furnace. It's set to 72. It has been since we arrived yesterday. Sometimes it turns on and sometimes it doesn't. If it does it blows cold air for a couple of minutes and then shuts off. I had to turn off the A/c breaker cause it would blow cold air when the heater turned on.

Any thoughts?

Dave Bleser
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Old 12-26-2012, 11:16 PM   #2
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Join Date: Aug 2010
Location: Intercourse, PA
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Check to see if you have propane, when your tanks get low the pressure in them often fails to let the valve open properly, Light your stovetop and see if they light. It is normal for the furnace to blow cold air from vents until the heat comes through. just a thought.
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Old 12-27-2012, 12:34 AM   #3
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Location: Illinois
Posts: 102
a faulty sail switch on the furnace will act this way. It detects that the fan is running and opens LP valve.
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Old 12-27-2012, 12:56 AM   #4
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Location: Texas
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Agree with other post, you are either out of propane or the sail switch is not allowing the gas valve to open. If the stove is not working either, then the tanks are empty, valves are closed or the change-over switch is in the wrong position. If the stove is working, then most likely the problem is with the sail switch. Are you hooked up to shore power and are the 12 volt lights full brightness? If not, then battery voltage is low and the blower is not running at full RPMs to turn the sail switch on. Another possibility is restrictions in the intake air duct and/or the blower motor, maybe spider webs or wasps nests. Call a local RV dealer to ask about a mobile RV tech. Assuming you do have shore power, go to Walmart and get a small electric heater, just don't run it on the highest setting as it will likely kick the breaker.
Larry Day

Texas Baptist Men-Retiree Builders member since '01
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Old 12-27-2012, 06:22 AM   #5
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Thanks y'all. After checking the battery and 2 new propane tanks, the sucker won't even turn on. Good thing I got a good portable heater. The sail switch should be under warranty as the trailer is only 5 months old.
Dave Bleser
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Old 12-27-2012, 06:39 AM   #6
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Location: WI
Posts: 559

Make sure you test run it at the dealership after it has
been repaired. We had to drive ours all of the way back to have our furnace
REALLY repaired.

2012 RAM 3500 ST + CHROME
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