Question about Heating & Cooling
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Posted on Jan 02, 2017
There are dip switches on the main board.. When you remove the lower panel on the air handler there are instructions to where the dip switches should be for your units fan control. if the switches are in the correct configuration.. The Thermostat may be malfunctioning or not wired properly. and last.. and most expensive.. the motherboard may also be failing.
Posted on Jan 12, 2009
Pilot lighted furnaces have a thermocouple made from disasimilar metals that when heated create electricity to actuate a relay that alows the gas to flow to the furnace.
When the thermocouple gets coated with carbon from the pilot lights constant burning it acts as an insulator and keeps the thermocouple from getting enough heat to generate electricity, a very good safety factor.
What you have to do is locate the thermocouple it should be located over the pilot light, you will see a gray substance around the thermocouple it will be hard like cement, take a knife and scrape away as much of the gray material as possible then sand the themocouple with a medium sandpaper until it shines, use one of you wifes emery boards, this should solve your problem.
Posted on Feb 24, 2009
depending on the year of the unit
if its between 1992-1999 it would be caused by the either the pilot not staying alight, or a faulty gas valve not opening,
These models start the fan on a time delay not tempreture so you will only get cold air circulating and when the thermostat is off the fan will stop.
(All models) if the fan is running regardless of the thermostat position an over heat sensor is faulty.
Posted on May 17, 2010
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