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Old 11-19-2006, 02:22 PM   #1
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1972 31' Excella 500
Ozark , Missouri
Join Date: Nov 2006
Posts: 8
Suburban furnace burping

We're in the process of getting our 72 Excella on the road for a trip this week, headed west, with a planned stop at Inland RV in a few days. In the meantime, however, we're going to be travelling through some cold country, and our furnace operation in iffy.

We've got the original Suburban furnace, and it appears to be in good shape inside and out (no obvious rust, bird's nest, etc.). However, once we get the pilot lit (and before the furnace lights up), it will occasionally (every minute or so) belch blue flame out the viewing port. Once the furnace has achieved the proper temp in the trailer and cycles off, the furnace will again 'burp', occasionally blowing out the pilot. Almost acts as if there is a gas leak in the combustion chamber, and when it fills up the pilot ignites it. Watching the inside of the chamber from the view port, I can see blue flame chasing around the top before it ignites. I've seen other posts on related symptoms, but haven't found an answer that matches my furnace's condition.

Obviously want to stay safe on the trip - any adjustments, thoughts, outside of adding more blankets to the bed and having Andy check it out?
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Old 11-19-2006, 02:43 PM   #2
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1967 26' Overlander
Huntsville , Alabama
Join Date: Dec 2003
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One of my goals is to also make a visit to Andy's

Sounds like an erratic LPG pressure regulator at your gas bottles to me.

Try a new regulator before leaving if you really want to safely use your furnace on the trip.

Tom
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Old 11-19-2006, 04:00 PM   #3
Frank S
 
1973 27' Overlander
peoria , Illinois
Join Date: Mar 2006
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Hi Blimphauler--Two small electric heaters, for the front and the back, might be a good investment. If you stay in campgrounds, you will have electric, and should be quite comfortable, during this fall season.--Frank S
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