Question about Heating & Cooling
Sounds like an over heat safety sensor is faulty,or blocked ducts to have to much heat buildup in furnace, best advise have a techie look atbit
Posted on May 17, 2013
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Posted on Jan 02, 2017
it very well sounds like your fan switch , does your fan work at all, like in ac mode on by turning the fan on/auto switch on the thermostat to ON. If the fan does come on its the more and likely the limit switch. if it doesnt come on it could be the motor or the run capacitor. the limit switch has a dial on it that as it heats up it spins clicking on at a desired set temp ussually about 120 to 150 degrees F. turning on the fan if the fan doen't come in the the next setting clicks off the gas valve turning off the burners ussually set at about 220 degrees F. now if the fan is working when the heater is satisfied there is a setting at about 90 deegrees F. that shuts the fan off hope this helps
Posted on Jan 05, 2009
On the unit outside there is a button that says "push man. pull auto" if it is set to push man then the fan will go constantly.
Posted on Nov 08, 2009
I have exactly the same problem. When I have the cover off there is a red light on, from what I can tell is the "Over Heat Fan" this seems to keep the fan on, and because it is in error prevents the system igniting. Haven't got a solution yet it only happened last night. Stu.
Posted on Jun 12, 2010
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