How to check the furnace gas valve with a multimeter step 1.
Test furnace gas valve.
Some gas valves cannot be checked with an ohmm.
Have an assistant plug in the appliance and turn on the gas feed valve.
Wait for the unit to cool if it has been in use.
Locate the gas valve mechanism which looks like a small metal device that has two coils attached to it.
Have the assistant set the dryer for high heat and turn the dryer on.
This video is part of the heating and cooling series of training videos made to accompany my web.
Turn off the furnace at the wall control.
Locate the gas valve.
This one shows how to do a voltmeter check of the gas valve.
Pull the wires off.
Take out the bolts in the service panel on the side of the furnace using a nut driver.
Sweep out any hair lint and foreign debris with a feather duster.