Furnace problems - Fiberglass RV


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Old 12-14-2013, 07:54 AM   #1
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Name: Tom
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Furnace problems

Hi all, I'm having trouble with my suburban furnace NT-20SE. It starts up, warms the camper to the proper temp then shuts down like it should. When the thermostat calls for heat again the furnace will not restart. All I get is a slight buzzing noise from the module board. Any ideas? Thanks.
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Old 12-14-2013, 09:30 AM   #2
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Make sure the points in the thermostat are clean. Your initial push to start the furnace from the OFF position provides a tad more pressure on the points than the usual cycling at temp does. Then I'd check wire-wiggle the furnace for loose connections - they do vibrate quite a bit. Also tap on the relay lightly and see if it's getting tempermental.

Charlie Y
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Old 12-14-2013, 09:38 AM   #3
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Thanks for the response. I just cleaned the points and will give it a try. The points were not making good contact to begin with as they sit at a bit of an angle to each other. Don't dare bend them as I fear they will pull loose of the plastic! Thanks again! I use my heater in my fishhouse in Minnesota and I'm itching to get out on the lake! Sounds crazy I know but it's truly relaxing to be in a nice warm shack on a frozen lake.
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Old 12-14-2013, 11:26 AM   #4
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Just do not make that house too warm, or you may sink into the water!
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Old 12-14-2013, 11:40 AM   #5
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Still no luck, not sure what to try next. Maybe the sail switch next? Looks like the fish are safe for at least one more day.
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Old 12-14-2013, 01:38 PM   #6
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Got it!

The sail switch was getting hung up on the mounting bracket. Put a penny in behind the switch as a spacer, clipped the top corner off the sail and bingo! It works! Look out fish, here I come!
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