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Thermostat malfunction I have a Honeywell Chronotherm III Thermostat model T8602B1006 and I cant get it to go back to normal after I have replaced the batteries and reset it. It is just stuck on a wake setting and the heat will not come on. What can I do, other than what I have done?

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You may want to shut the breaker off to your furnace or air handler, or if you have a packaged system turn it's breaker off. This will kill the low voltage to the stat possibly allowing it to reset. I would also try to reset it after you turn your breakers back on.

Posted on Dec 23, 2007

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Posted on Jan 02, 2017

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