Dryer too hot - how to test 4-prong thermostat? - Appliance Repair Forum

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Dryer too hot - how to test 4-prong thermostat? Options Email this topic Watch this topic Print this topic » Normal Threaded
Model: REX4634KQ1	Brand: Roper	Age: 5 - 10 years
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aliensoup		#1 Posted : Monday, January 25, 2010 5:53:48 PM(UTC)
Rank: Member Groups: Registered Joined: 1/25/2010(UTC) Posts: 1		I have read that when the dryer is shrinking clothes (even in the low heat setting) it could be due to a failing thermostat. I tested the two High-Limit thermostats and they measure close to zero, but not quite (1 to 3 ohms). The Internal Bias thermostat has 4 prongs. One pair is close to zero and the other one measures infinity. Is this right? Thanks in advance for your help!:)


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sidfink43		#2 Posted : Wednesday, January 27, 2010 2:03:58 PM(UTC)
Rank: Advanced Member Groups: Senior Expert Joined: 3/29/2009(UTC) Posts: 11,699		If the problem is your operating thermostat it will not show up in a continuity or ohms test because the problem is it is not opening when it should. Try replacing it, it is not a high cost item and see if that helps. Before you do that however, clean out the dryer, with particular attention to the intake grid and outlet vent through the blower, and the outside vent. High heat may be coming from obstructed venting.


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THATCHER25		#3 Posted : Thursday, January 28, 2010 8:56:07 AM(UTC)
Rank: Member Groups: Registered Joined: 1/28/2010(UTC) Posts: 1		I just replaced the heating element Thermal fuse and the thermostat on my dryer. It worked fine for about 5 minutes then it overheated and stop working. I noticed that the it over heated. Model # LNC7749A71.


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sidfink43		#4 Posted : Thursday, January 28, 2010 12:29:39 PM(UTC)
Rank: Advanced Member Groups: Senior Expert Joined: 3/29/2009(UTC) Posts: 11,699		Hi Thatcher Please start a new post and I am sure someone will be able to help you. The more details you can give the better the answer will be.


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denman		#5 Posted : Friday, January 29, 2010 12:42:59 AM(UTC)
Rank: Advanced Member Groups: Senior Expert Joined: 2/29/2008(UTC) Posts: 19,638 Thanks: 1 times Was thanked: 11 time(s) in 11 post(s)		aliensoup Here is your wiring diagram http://www.servicematters.com/docs/wiring/Wiring%20Sheet%20-%208528187.pdf Does sound like the cycling thermostat is toast. It's internal heater should read 7,000 ohms approximately not infinity (open). Of coarse this depends if you had the meter on the correct scale. On most digital meters it should be on the 20K scale.
		THIS FORUM IS DEAD!!!!!!!


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