10-15-2017, 09:32 PM
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#3
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,364
M.O.C. #4831
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This is a common problem. The fan must be set to Auto when running the furnace. Otherwise the A/C fans will run also. It is documented in the thermostat manual. Do a "Search" and you will find lots of posts on the this. For example:
http://www.montanaowners.com/forums/...ghlight=heater
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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