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grower  
#1 Posted : Monday, September 28, 2015 6:06:52 AM(UTC)
grower

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Dryer overheats and blows thermal fuse. Thermostats have been replaced, element checks good and visually and with meter shows not being grounded. Vent is new and clear and only 6 ft. in length. Strong air flow from back of dryer.
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denman  
#2 Posted : Monday, September 28, 2015 11:25:45 AM(UTC)
denman

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A model number would be helpful.
Find your model number - AppliancePartsPros.com
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grower  
#3 Posted : Monday, September 28, 2015 2:04:15 PM(UTC)
grower

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It is a Inglis by whirlpool. Model # is 1EX3000RQ1. Hope this will help!
denman  
#4 Posted : Tuesday, September 29, 2015 5:54:36 AM(UTC)
denman

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Here are your parts
Parts for Whirlpool IEX3000RQ1 Dryer - AppliancePartsPros.com

I believe the first digit in the model number is an i not a 1.

See the attachment for the wiring diagram.

I am assuming the thermal fuse that is blowing is the one on the blower.

I would double check with a meter that the heater is not grounded re: Infinite resistance from both sides to its case.

When you say the thermostats were replaced was this the Operating Thermostat on the blower and the Hi-limit Thermostat on the heater, is this correct

Was the operataing thermostat you received adjustable. It should have been . If it was where did you set it.
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grower  
#5 Posted : Tuesday, September 29, 2015 9:15:36 AM(UTC)
grower

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This dryer belongs to a friend that I was trying to help. I first encountered the upper thermostat was bad and I replaced it. The dryer ran, overheated in about 15 minutes and blew the thermal fuse. In checking I found that the cycling thermostat was not opening even though it had continuity, when heated it would click but still would not open and break the continuity. Here I thought was the smoking gun I was looking for. I ordered the high and low thermostats with come together as a kit, the cycling thermostat, and the thermal fuse. I have had the heat element out and ran continuity on it and also from each terminal to the housing and got no grounding. I visual checked the element as well but could see no breaks. If you run the dryer on the fluff cycle it does not heat up. I removed all the back housing to check for blockages of any kind and everything was completely clean. I put everything back together again and just new this time it was going to be right but after about 15 minutes it blew the thermal fuse again. None of the thermostats that I received were adjustable. The top one was part number 3977398 and the cycling one was part # 3977767 and the thermal fuse was 3392519. I do not have the number off the lower thermostat but that was has never blown. Hope this detail will help. Thanks,
denman  
#6 Posted : Tuesday, September 29, 2015 10:08:46 AM(UTC)
denman

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I do not know what is going on here.
I think that the 3977767 is the hi-limit thermostat (221 degrees).
3392519 comes up as a thermal fuse.
3977398 does not come up but the web site jumps to the 3977767 so it is probably the thermal cut-off.

The cycling thermostat is item 19 in section 03 of the parts (135 to 155 degrees).
Click on the picture for more info.
Part number: AP3115922
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