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3 year old Lennox system stops intermittently 2-3times past 24hrs

3 year old Lennox system stops intermittently. We reset the thermostat and the system starts back up. We don't notice this until the temp has risen several degrees and it is getting uncomfortable in the house. 1st time found the thermostat was blank no backup batteries had ever been installed. installed batteries and cycled the circuitbreakers. This has happened 2 or 3 times in the last 24 hours. Any help is appreciated!

Honeywell thermostat

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I would have the thermostat receiving 24 volts all the time by running the c terminal from the air handler to the thermostat and go from there

Posted on Jun 21, 2009

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Posted on Jan 02, 2017

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