Discuss

Burning out Thermal Cut Out

 in

Dryer Repair

. "

Originally Posted by Foghorn Ok guys, I went to check the cycling of the heating element but before I did

..."
 
 
Register | FAQ's | New Posts | Today's Posts | Extras
Appliance Repair Forum > Appliance Repair Help > Dryer Repair » Burning out Thermal Cut Out

Post New Thread  Reply By reading any content on this site you agree to AppliancePartsPros.com, Inc. disclaimer and Terms of Use.
 
LinkBack Thread Tools Search this Thread Display Modes
  #11 (permalink)  
Old 12-02-2012, 10:15 AM
Junior Member
 
Join Date: Nov 2012
Posts: 9
Foghorn is on a distinguished road
Default

Appliance Parts from AppliancePartPros.com


Quote:
Originally Posted by Foghorn View Post
Ok guys, I went to check the cycling of the heating element but before I did I checked the the Thermistor--it is open. I have one on order and will let you know what happens when I get it replaced.

I now have a new dilema. I received the new thermistor but both terminals were bent over so before straightening them out I checked to see if the part showed good with the meter. It read "open" so I contacted the parts people and they sent me a new part. This one arrived in good physical condition but when I put the meter on it it also reads "open". According to the tech sheet I should be getting a reading of about 10 ohms. Am I reading the tech sheet wrong or something or am I receiving bad parts? At this point I hesitate to put put the part in and burn out another thermal cut out. Your help is greatly appreciated.

Reply With Quote
See inside of your appliance - diagrams and part photos for virtually every model.

powered by AppliancePartsPros.com
 
  #12 (permalink)  
Old 12-02-2012, 11:31 AM
Senior Expert
APP Volunteer
 
Join Date: Feb 2008
Posts: 17,339
denman is a name known to all
Default

I think you read the tech sheet wrong.
Should be 10 Kohms or 10,000 ohms.
__________________
-
Reply With Quote
  #13 (permalink)  
Old 12-02-2012, 01:08 PM
Junior Member
 
Join Date: Nov 2012
Posts: 9
Foghorn is on a distinguished road
Default

Quote:
Originally Posted by denman View Post
I think you read the tech sheet wrong.
Should be 10 Kohms or 10,000 ohms.

You are correct, I did miss the "K". My "Fluke" meter reads OL but when I put my little cheapie on Rx100 I get a reading of about 100 so it looks like the parts are good---correct? That being said I will check the temperature of the dryer exhaust and try to do a visual to see if the element is cycling.
Reply With Quote
  #14 (permalink)  
Old 12-02-2012, 04:06 PM
Senior Expert
APP Volunteer
 
Join Date: Feb 2008
Posts: 17,339
denman is a name known to all
Default

correct?
Correct.

Your Fluke probably gives an OL because you are using a too low scale.
Set it to the 20K scale if it has one and it should read the resistance.
__________________
-
Reply With Quote
  #15 (permalink)  
Old 12-02-2012, 07:15 PM
Junior Member
 
Join Date: Nov 2012
Posts: 9
Foghorn is on a distinguished road
Default

Quote:
Originally Posted by denman View Post
correct?
Correct.

Your Fluke probably gives an OL because you are using a too low scale.
Set it to the 20K scale if it has one and it should read the resistance.

I put the original thermistor back in the machine since it tests good and ran the machine for 5 or 6 minutes. At about 4 minutes the heating element cycled off and back on about a minute later. I didn't continue to run the machine since nothing has changed and I think we will just burn out another thermal cutout. Any more ideas on where to look?
Reply With Quote
  #16 (permalink)  
Old 12-03-2012, 01:16 AM
Senior Expert
APP Volunteer
 
Join Date: Feb 2008
Posts: 17,339
denman is a name known to all
Default

Your problem is intermittent so you are stuck just replacing parts until you find the right one.

You have checked the vent system and the heater and both came up OK.
So next on my list would be the thermistor. I would use the new thermistor.
This is based on cost more than anything else.

Next would be the control board as Simon said.
It could be the heater relay contacts are sticking closed once in a while or the electronics that control the relay are going bad.
When relay contacts start to pit due to use they often want to stick together.
__________________
-
Reply With Quote
  #17 (permalink)  
Old 12-03-2012, 12:51 PM
Junior Member
 
Join Date: Nov 2012
Posts: 9
Foghorn is on a distinguished road
Default

Quote:
Originally Posted by denman View Post
Your problem is intermittent so you are stuck just replacing parts until you find the right one.

You have checked the vent system and the heater and both came up OK.
So next on my list would be the thermistor. I would use the new thermistor.
This is based on cost more than anything else.

Next would be the control board as Simon said.
It could be the heater relay contacts are sticking closed once in a while or the electronics that control the relay are going bad.
When relay contacts start to pit due to use they often want to stick together.

Ouch! I was afraid we were down to that. At $184 to $191 for the control boards I will be looking for a new dryer for my grandaughter. Thanks for all your expert advise and help. I will be sure to "pick your brain" the next time I get stumped.
Reply With Quote
  #18 (permalink)  
Old 12-04-2012, 04:31 AM
Senior Expert
APP Volunteer
 
Join Date: Feb 2008
Posts: 17,339
denman is a name known to all
Default

OK since you have decided to scrap it, you may want to try a last ditch effort to save it.

Open up the heater relay on the control board and check/clean the relay contacts. Usually cleaning will fix the problem in the short term but for a permanent fix the relay must be replaced.
Getting it open can be a pain.
A dremel with a cutting head should let you cut off the cover just above it's base plate. Getting in there may not be possible. You just want to cut through the plastic, cutting too deep will destroy the relay.
Most relays are sealed but still check to see if the top will pop off.

Often easier just to remove (un-solder) the relay from the board and then open it up.
Before doing anything get manufacturer numbers etc. off the relay.
Then if the contacts are shot you may be able to hunt down a replacement relay.
__________________
-
Reply With Quote
See inside of your appliance - diagrams and part photos for virtually every model.

powered by AppliancePartsPros.com
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
keeps burning out thermal fuse comglaze Dryer Repair 2 03-31-2014 08:34 PM
Thermal fuses keep burning out perch43 Dryer Repair 5 02-06-2012 04:45 PM
Frequent Burning of Thermal Fuse JBorcillo Dryer Repair 0 02-01-2012 05:34 PM
Kenmore dryer -no heat and burning thermal cutt off msteinson Dryer Repair 0 09-29-2011 07:16 PM
Dryer's Thermal cutt off keeps burning nfusmani Dryer Repair 7 09-29-2010 04:56 PM



All times are GMT -7. The time now is 01:05 AM.

The content on this web site is for informational purposes only and is not intended to replace an on-site diagnosis from a qualified appliance service technician. By reading any content on this site you agree to AppliancePartsPros.com , Inc. disclaimer and Terms of Use.
Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17