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    jones568's Avatar
    jones568 Posts: 2, Reputation: 1
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    #1

    Dec 29, 2009, 12:45 PM
    Concord 80 plus furnace fails to start at set temp
    Hello,
    I have a concord 80 plus furnace model C2E24A-2A. Thermostat control mounted in my hall way is a white-rodgers model 1F78. I have it set on auto for 70 degrees. Lately I found the temp. has fallen to 66 or below 70 and the furnace has not kicked on. I then will have to turn the thermostat all the way off for a few minutes and then turn it back on. Even then sometimes I will have to flip the controls around to get it to start. The furnace is about 5-6 years old. I had it serviced 2 years ago.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #2

    Dec 29, 2009, 05:45 PM

    The thermostat may not be the problem. A malfunction may be causing the furnace to initiate a timed lockout, and cancelling the thermostat demand may be cancelling the lockout. If the circuit board has a status light, it will provide clues.
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