Results 1 to 8 of 8

Thread: WTMC3300US/02 Bosch Dryer - Thermal Reset tripping

  1. #1
    Join Date
    May 2019
    Location
    Seneca
    Posts
    4

    Default WTMC3300US/02 Bosch Dryer - Thermal Reset tripping

    Model Number: WTMC3300US
    Brand: Bosch
    Age: More than 10 years

    I have a Bosch Nexxxt dryer that is >10 years old but has developed a problem. The thermal reset on the side of the heating element keeps tripping. I reset it last night and used the dryer and it ran two loads, but on the second it tripped the reset again.

    I've ordered another reset but do these things actually go bad? Since it will reset and then will get hot I think the element is okay. I tried to clean the lint out of the element the best I could - when I get the new one I plan to do a more thorough cleaning.. The thing that is puzzling me is that it will be okay for one load but the next it goes out, which tells me that it is an issue with either accumulated heat or the reset has gone bad. The exhaust tube is clear - has some lint along the sides but isn't clogged at all.

    Could the issue be the temperature sensor that is in the heating vent?

    If the element itself is bad I may just replace the dryer. It's getting some age on it and I don't want to have to keep throwing parts at it, but a $40 reset I'm willing to do.

    Thanks in advance.

  2. #2
    Join Date
    Aug 2004
    Location
    McMullen Valley, Arizona
    Posts
    98,580

    Default

    Hi,

    Are you referring to this thermostat:
    00422272 Limiter-Temperature


    Yes, they can just wear out after 10 years.

    You have to make sure you clear all the lint out of the dryer, they are very sensitive to air flow through the heating element.

    Could the issue be the temperature sensor that is in the heating vent?
    Do your clothes seem too hot when they come out of the dryer?

    I'd start using MEDIUM HEAT instead of HIGH HEAT. I never use HIGH HEAT on my dryer and the clothes come out perfect every time.

    Jake
    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
    Jake's Appliance Repair Nov. 2005-present

    Look-Up & Order Parts

  3. #3
    Join Date
    May 2019
    Location
    Seneca
    Posts
    4

    Default

    That's it. I ordered it and the other thermostat just in case. Mainly because shipping was kinda expensive and I didn't want to pay it twice.

    Would a bad/shorted heating element do what I'm seeing (work for one load but trip the thermostat on the next one)? How would that behave?

    Plan is to give the heating element a good clean and inspection when I replace the thermostat.

    Thanks for your help.

  4. #4
    Join Date
    Aug 2004
    Location
    McMullen Valley, Arizona
    Posts
    98,580

    Default

    If the heating element was grounded it would heat in the AIR FLUFF/NO HEAT cycle.

    Try it in AIR FLUFF/NO HEAT cycle and see if it gets hot.

    Jake
    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
    Jake's Appliance Repair Nov. 2005-present

    Look-Up & Order Parts

  5. #5
    Join Date
    May 2019
    Location
    Seneca
    Posts
    4

    Default

    Will try that tonight.

    Thank you so much for your help.

  6. #6
    Join Date
    Aug 2004
    Location
    McMullen Valley, Arizona
    Posts
    98,580

    Default

    Ok, sounds good, yes keep us posted.

    Jake
    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
    Jake's Appliance Repair Nov. 2005-present

    Look-Up & Order Parts

  7. #7
    Join Date
    May 2019
    Location
    Seneca
    Posts
    4

    Default

    So far it works fine on lower heat and doesn’t trip the thermostat. This thing doesn’t really have heat settings so much as damp dry, dry, really dry, and burned to a crisp or something. But the lower settings do seem to produce less heat.

    Last night I pulled the heater, cleaned it with compressed air and did a ground check. No continuity from the element to the heater housing but continuity from one end to the other. So all good there. Also cleaned out as much dust and lint as I could.

    Will put the new high limit thermostat in once I get it just to be safe.

    Thanks again for your help.

  8. #8
    Join Date
    Aug 2004
    Location
    McMullen Valley, Arizona
    Posts
    98,580

    Default

    Excellent SC Tiger, glad to hear that.

    Thanks for the update!

    Jake
    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
    Jake's Appliance Repair Nov. 2005-present

    Look-Up & Order Parts

Similar Threads

  1. Kenmore 110.12502100 tripping thermal cutoff?
    By Sunflower in forum Sears Kenmore
    Replies: 16
    Last Post: November 17th, 2018, 09:14 PM
  2. Whirlpool Dryer GEQ8858 keeps tripping Thermal Fuse
    By chriswf in forum Whirlpool/KitchenAid/Roper/Estate
    Replies: 8
    Last Post: October 22nd, 2017, 01:41 PM
  3. ES650DORS State Select Water Heater Reset Button Tripping
    By Gowolfpack83 in forum Water Heaters
    Replies: 8
    Last Post: July 1st, 2017, 11:34 AM
  4. Replies: 11
    Last Post: October 7th, 2014, 09:13 PM
  5. Bosch Reset
    By jimmyc in forum Bosch
    Replies: 14
    Last Post: October 27th, 2005, 06:58 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
  •  
If you feel that you have benefited from this site, and would like to show your appreciation, you can throw a buck or two in the Appliance Blog Tip Jar - Thank you!