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My electric dryer will not heat at all. I have checked the heating element & limiter fuses, all check out ok. I have found the Thermostat (part # AP4038076) and assume it must be the culprit, but don't know how to check it out. There are 5 wire connectors, but how do you know how to test it? I get continuity between some of the lugs, but don't know what combination to check. Can anyone help me? I checked the continuity between the end with the single lug & the end with 2 lugs (1 lower, 1 upper). I have continuity between two lower lugs but not upper end lug & opposite end lug. The two lugs on sides have very limited continuity between each other.
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Rank: Advanced Member
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Joined: 8/16/2007(UTC)
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The part number you posted is a cycling thermostat. The two larger terminals are what you need to check for continuity. The specs for your dryer show five components for your heat: The thermal fuse and high limit thermostat, both located on the heater housing; the heater coil, also inside the heater housing; and the cycling thermostat (the one you described in your post), and thermal cut-off, both located on the blower housing.
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Rank: Member
Groups: Registered
Joined: 7/10/2009(UTC)
Posts: 11
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Originally Posted by: magician59  The part number you posted is a cycling thermostat. The two larger terminals are what you need to check for continuity. The specs for your dryer show five components for your heat: The thermal fuse and high limit thermostat, both located on the heater housing; the heater coil, also inside the heater housing; and the cycling thermostat (the one you described in your post), and thermal cut-off, both located on the blower housing. All of these have continuity. Where do I go from here? I have 240v measured across the 2 side plug terminals.
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Rank: Advanced Member
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If there is a circuit board (there will be, if one of the components is a thermistor), You may need to replace it. Make certain you have reconnected wires you pulled of to do the continuity tests, before committing to the purchace of parts.
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Rank: Member
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Originally Posted by: magician59 If there is a circuit board (there will be, if one of the components is a thermistor), You may need to replace it. Make certain you have reconnected wires you pulled of to do the continuity tests, before committing to the purchace of parts. No circuit board that I can find, plus I don't see any indication of one on diagram for this model. I am really baffled. I checked out continuity of temp. switch to the cycling thermostat, all are good per diagram. Could it have something to do with timer? I don't know, but I wonder if the heating circuit is getting power? I double check voltage at outlet; it is right at the outlet.
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Rank: Member
Groups: Registered
Joined: 7/10/2009(UTC)
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Originally Posted by: ayersl No circuit board that I can find, plus I don't see any indication of one on diagram for this model. I am really baffled. I checked out continuity of temp. switch to the cycling thermostat, all are good per diagram.
Could it have something to do with timer? I don't know, but I wonder if the heating circuit is getting power? I double check voltage at outlet; it is right at the outlet. As I read what I wrote about not having power, I opened the access panel to the terminal block. I found that the light blue wire coming from L2 had come loose from the connector lug! The wire had melted at the end where it connects to the connector lug and was just hanging around. I will install a new lug, and I think it should work ok. I am just thankful that it didn't start a fire! Thanks for all of you help; I now know more about dryers than I ever wanted to know!
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Rank: Advanced Member
Groups: Senior Expert
Joined: 8/16/2007(UTC)
Posts: 3,273
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Well done! The scenario you described, with the possibility of a fire, is the reason I NEVER leave the house while any of my heat generating appliances is in operation (with the exception of the water heater--otherwise, I would be home forever). In regard to knowing more than you wanted to know about your dryer: Now you can help others to solve their dryer heat problems. Besides: It never hurts to be the master of our machines.
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