Results 1 to 7 of 7

Thread: Whirlpool dryer; does not cut off; Thermistor and high limit thermostat replaced

  1. #1

    Whirlpool dryer; does not cut off; Thermistor and high limit thermostat replaced

    Model Number: WED6200SW1
    Brand: Whirlpool
    Age: 1-5 years

    Whirlpool Electric Dryer – Cabrio – model # WED6200SW1 (3 years old)

    History: Clothe was getting too hot and the dryer not automatically shutting off when finished. After a couple weeks, the dryer stopped. I checked the Thermal Fuse (#3392519) which is mounted on the duct housing coming from the blower. It was blown. I “assumed” that the Thermistor (#85774274), (sometimes called duct thermostat or internal-bias Thermistor) also located on the outside of the duct housing, was bad. I replaced both the thermal fuse and Thermistor. Apparently the Thermistor, was not bad since I measured the resistance of the new thermistor and compared it to the original thermistor and they both had a resistance of approximate 10,500 ohms at room temperature. Anyway, we tried the dryer again and the clothes overheated and the next day the Thermal Fuse blew again. This time I ordered another thermal fuse and also replace the High Limit Thermostat (# 8577891). It is rated 126.7oC and 37.7oC. (NOTE THIS THERMOSTAT also has another 2 connectors which feed into the lower voltage section of the control panel). After receiving the new High Limit Thermostat, I determine that the both the old and new Thermostat have the same resistance (0 ohms across the main thermostat and 47,000 ohms across the small thermistor). Anyway, since I already purchased it, I replaced it. The dryer worked for part of a cycle, the cloth still got to hot and the thermal fuse blew again. The heating element looks perfect and measures 11.3 ohms. The Thermal cutoff switch (located 1 foot above the heating element) also appears good. It measures 0 ohms.
    Now that I replaced both (a) the High Limit Thermostat and (b) the Thermistor (i.e Internal-Bias Thermistor or duct thermostat), what else could be causing the problem.?
    Thanks

  2. #2
    Admin/Technician Doc Ryan's Avatar
    Join Date
    Mar 2011
    Location
    South Dakota
    Posts
    3,530
    Have you checked to see if the heating element is shorted to ground?
    Ryan
    www.PartsDr.com - Discount Appliance Parts & Accessories

    Please help keep our repair forum FREE by purchasing your replacement parts from our online store. Thank you for your support.

    Circle Parts Dr On Google+

    "Like" Parts Dr on Facebook


    Follow Parts Dr on Twitter

  3. #3

    Whirlpool dryer does not cut off under high temperatures

    Quote Originally Posted by Doc Ryan View Post
    Have you checked to see if the heating element is shorted to ground?
    Thanks for responding to my question. I double checked. The heating coil is in great shape. It is not grounding out

  4. #4
    No need for more response. I removed the cover to gain access to the electronic control panel. Low and behold, a technical manual was under the cover. It had a very comprehensive diagnosis write-up. According to the test, (measure resistance between post 6 and post 3 on the P4 control board connector, I have a bad control panel. (Most likely, it is the relay that is soldered onto the board, but one cannot find a part number to replace only the relay, thus one has to replace the entire board.

  5. #5
    Admin/Technician Doc Ryan's Avatar
    Join Date
    Mar 2011
    Location
    South Dakota
    Posts
    3,530
    Yes that relay on the control board could be sticking and causing the heat to stay on and overheat. The manufacture does not sell any individual components on control boards, so the whole control board must be replaced if it has a failure.

    This is the control board for your model dryer:

    Control Board - W10111617
    Ryan
    www.PartsDr.com - Discount Appliance Parts & Accessories

    Please help keep our repair forum FREE by purchasing your replacement parts from our online store. Thank you for your support.

    Circle Parts Dr On Google+

    "Like" Parts Dr on Facebook


    Follow Parts Dr on Twitter

  6. #6

    response

    Doc Ryan
    Thanks, I came to the same conclusion this afternoon after many hours of readin gand then finding the diagnostic manual hidden in the control cover casing. , I was thinking about removing the sealed relay, but I did not see any generic number to find a replacement. The control board is expensive, but still is far less than a new dryer.
    Again Thanks for your assistance

    Quote Originally Posted by Doc Ryan View Post
    Yes that relay on the control board could be sticking and causing the heat to stay on and overheat. The manufacture does not sell any individual components on control boards, so the whole control board must be replaced if it has a failure.

    This is the control board for your model dryer:

    Control Board - W10111617

  7. #7
    Admin/Technician Doc Ryan's Avatar
    Join Date
    Mar 2011
    Location
    South Dakota
    Posts
    3,530
    If you can, let me know if it takes care of your problem after you replace the control board.
    Ryan
    www.PartsDr.com - Discount Appliance Parts & Accessories

    Please help keep our repair forum FREE by purchasing your replacement parts from our online store. Thank you for your support.

    Circle Parts Dr On Google+

    "Like" Parts Dr on Facebook


    Follow Parts Dr on Twitter

Similar Threads

  1. Replies: 7
    Last Post: 08-12-2013, 09:13 PM
  2. Natural Gas Oven Thermostat For Use In A Smoker
    By JDTRK2 in forum Range, Oven, & Cooktop Repairs
    Replies: 1
    Last Post: 04-30-2013, 12:46 PM
  3. [FIXED] Whirlpool Dryer lint fire thermistor blew
    By Treespalette in forum Dryer Repair
    Replies: 7
    Last Post: 02-04-2013, 09:08 PM
  4. water dispenser in Ice/Water in Door unit won't cut off
    By John Rotty in forum Refrigerator or Freezer Repair
    Replies: 1
    Last Post: 07-01-2012, 01:34 PM
  5. replaced thermal fuse & dryer still won't start
    By Terri Lee Clark in forum Dryer Repair
    Replies: 1
    Last Post: 04-03-2012, 09:21 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •