Question about Heating & Cooling
Go to the furnace and turn off the power take the door off you must have a multimeter inhand with the cover off the furnace and access to the gas valve put yor meter leads on the wires going to the gas valve turn the power on and after the ignitor glows up there should be power to the gas valve to open and turn burners on if there is then the gas valve is probably bad. You can also try ohming out the gas valve terminals witha multimeter if it ohms out it is probably bad id it doesn't then the gas valve is probably bad. This sould get you started if you have no power to the gas valve then you need to start tracing power and checking switches check the vent pressure switch with an ohm meter as well as all the limits in the furnace like the high limit and the rollout switch with the ohm meter.
Posted on Feb 07, 2010
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Posted on Jan 02, 2017
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