Question about Heating & Cooling
Furnace has been serviced regularly each year. Ran fine last winter, air worked fine all summer when needed. When I turned thermostat to heat and dial up to call for heat the inducer fan starts and the ignition lights the pilot, but the burners will not kick on. Oh, I should correct myself. Last winter, 1 time the burners would not light for a few hours and when I shut off the power and checked everything I could (connections, etc..), I turned the power back on and it worked fine the rest of the winter. Any thoughts?
There are 4 -steps for full run time to kick in a furnace.. step-1, inducer fan runs & prove thru the air tube which closes a switch and tell the circuit board to go to step-2, the igniter lights the pilot & prove its lit by heating the thermocouple, which tells the circuit board to go to step-3, opens the gas valve to dump gas in, which will light from the pilot light, and prove by a flame sensor metal stick on the last burner , which heats up and tell the circuit board Saying, ok , I've got flame.. step-4. when the box heats up, it closes a switch and turn on the main fan...! (Some gas-valves has a brain -or circuit board on top of them and are real sensetive to moisture..)
Posted on Sep 05, 2008
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Posted on Jan 02, 2017
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