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Old 06-18-2011, 08:11 PM   #1
Join Date: Mar 2011
Posts: 54
Furnace is unhappy

Having a bit of trouble with my furnace right now and couldnt find anything in a search that sounded the same.

When i turn on the heat the fan kicks in and 30 seconds or so later i hear an odd wirring or vibration coming from the furnace area...kind of like the water pumps sound. Over this sound i can hear the igniter sparking but the funace doesnt catch. I know there is propane to it because i though it may have been wind so i went outside and partially covered the air inlet and it did light but it gave me some back pressure as well when it did light. Trailer is a 2012 XLR 23FBV and i beleive the furnace is a dometic.

Any ideas?

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Old 06-18-2011, 08:37 PM   #2
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Join Date: Nov 2010
Location: Roanoke, VA
Posts: 415
You might want to make sure that a spider or other critter has not taken up residence in the burner area. A spider web can wreak havoc on air flow and give poor combustion as well as be hard to light and stay lighted.

Chris in Virginia

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Old 06-19-2011, 08:00 AM   #3
Join Date: Aug 2010
Posts: 84
It might be combustion blower issues that could explain the back pressure. If that is the case though its not typically a DIY fix.
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