SOURCE: Whirlpool dryer LGR7646EQ3. Burner lights before pushing start.
The heat is regulated with a Klixon mounted next to the blower housing
near the vent pipe so it can judge the temperature of the air coming
out of the drum.Right next to it is a melting type fuse. If the dryer
runs and gets too hot the fuse will melt.But the dryer will still
run. So if the fuse is good(continuity) and the dryer control(cycle)
thermostat is also good then you should have power going to the gas
valve assembly when the machine is running unless the timer is in the
no heat or wrinkle free/cool down mode. When the gas valve assembly is
energized the flame sensor mounted outside the burner chamber detects the heat from the ignitor.
When the heat is very intense then the sensor shuts down the ignitor and that frees up the power so that the coils can be fully energised
and open the gas gates. The gas comes out and hits the red hot ignitor
and you have ignition. It stays on for maybe 2 or 3 minutes or until
the control thermostat is satisfied and shuts down power to the gas
valve assembly.
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SOURCE: Dryer motor/heat does not start
This may sound dumb, but it happened to me once. I turned off the breakers, then turned them back on and it worked. Sounds like you have done all the other stuff. The last thing that the other fellow put on the site, makes sense as well. Check the breaker first and the connections.
SOURCE: whirlpool gas dryer no heat
One the terminals on the flame sensor fell off. II guess this is a common problem. relaced the sensor and
I'm back to drying clothes.
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