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

    May 16, 2011, 02:34 PM
    Lennox auto thermo not working cool air not heat coming from heater
    Heater was not working and then suddenly coming on at 4:00 in morning. Does the lennox heater in my attic have a reset button?? Only cool air coming out now... What can I do? I checked the thermo batteries and the thermo box seem to be working just fine...
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #2

    May 16, 2011, 05:58 PM

    Provide more info about the heater (model#, gas/elec. etc.).
    tomperkins's Avatar
    tomperkins Posts: 2, Reputation: 1
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    #3

    May 16, 2011, 06:06 PM

    It is a gas heater in the attic of home central heat I don't know the model # yet. If I change the filter would that help? I will do this tonight also I will try putting the heater on OFF, waiting 15min and trying it again. With these two things being done I hope it will fix the problem. Can you think of anything else I can do??
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #4

    May 18, 2011, 03:46 AM

    If the air filter is clogged, it may cause the high-limit control to cycle the burner off due to overheating. If this occurrs frequently and often enough, it can cause the high-limit control to be stuck in the open position.
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