Question about Honeywell Programmable Thermostat Heater
The furnace turns on but about 10 seconds later it turns off and then waits another 10 seconds and turns on again. Is something hooked up wrong? Why is it doing this?
Does the furnace burners light? You could have a bad thermostat or a flame sensor. To check if it is thermostat turn power off to furnace take thermostat off wall take wires marked r & w and connect them together then turn power back on. If furnace comes on and stays on then you need a new themostat if not it is the flame sensor inside furnace. Also check furnace filter
Posted on Jan 16, 2009
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Posted on Jan 02, 2017
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