i have a comfortmaker hi-efficiency furnace that was installed brand new in my house about 9 years ago and have always had problems. when the heat is set it will blow out cold air-i have to go down and turn off the switch on the furnace and flip it back on to get heat.any idea of what could be the problem?? thank you.
have you checked all the wire connections for any looseness or corrosion at the terminals? also make sure thermostat connections are tight, and make sur that the furnace circuit breaker is not the culprit. Hube
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