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Old 09-18-2011, 07:43 PM   #1
NorminN.B.'s Avatar
Join Date: Oct 2010
Location: Saint John, N.B. Canada
Posts: 65
Furnace control

I tried my furnace, the other day. The inside temp was 60 degrees. The furnace started as soon as I moved the thermostat up to 10 degrees. The furnace ran good, but when the temp hit 70, where the stat was set, it didn't shut off. The temp was nearing 80 degrees, and I shut it down. Would the thermostat be bad, or sticking? I took the cover off, in case there was some dust on a bug in there, but didn't find anything. The trailer is an 09 Cherokee, 39L. Thanks

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Old 09-18-2011, 09:26 PM   #2
Site Team - Lou
Herk7769's Avatar
Join Date: Oct 2009
Location: South Eastern PA
Posts: 19,830
Sounds like a bad thermostat. It controls the furnace.

Don't confuse the fan with the fire though. The fan will run for a few minutes after the thermostat tells the fire to shut off to cool the heat box. It also starts the fan first; prior to starting the fire; A "sail switch" in the furnace outflow has to close before the fire is allowed to start.


Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
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Old 09-19-2011, 10:33 AM   #3
NorminN.B.'s Avatar
Join Date: Oct 2010
Location: Saint John, N.B. Canada
Posts: 65
Thanks, Herk. Thats what I thought, also. Will have to look for a new thermostat.
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