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-   -   Whirlpool Dryer not heating (http://www.houserepairtalk.com/f11/whirlpool-dryer-not-heating-15026/)

ccpyue 11-03-2012 07:05 PM

Whirlpool Dryer not heating
 
I've a Whirlpool Dryer was working fine in first load of drying today. Second load and it won't heat (Timer and drum work OK). Heating element fine by checking it connectivity. So I also checked its Thermostat. It has 4 different Thermostat, and I checked with my multi-meter with result as below:

1) Fuse Thermal - checked connectivity OK
2) Thermostat High Limit 250 F - connectivity OK
3) Thermal Cut-Off (Hi limit Thermostat illus.) - no connectivity - I tried to short it and turn on the dryer, but still not heating.
4) Thermostat internal Bias - Two Red thick Wire connectivity OK; 2 Brown thin wire has no connectivity.

Can anyone tell me what is the above result mean? Where went wrong?

Thank you.

jeff1 11-03-2012 08:03 PM

Hi,

Model#?
http://www.applianceaid.com/model-number.php Some model# helps.

Quote:

1) Fuse Thermal - checked connectivity OK
Good.

Quote:

2) Thermostat High Limit 250 F - connectivity OK
Good.

Quote:

3) Thermal Cut-Off (Hi limit Thermostat illus.) - no connectivity -
That will have to be replaced.

Quote:

I tried to short it and turn on the dryer, but still not heating.
Then you have two issues/problems.

Quote:

4) Thermostat internal Bias - Two Red thick Wire connectivity OK; 2 Brown thin wire has no connectivity.
Probably fine, you need a really good meter to read the high reisstance of that heater inside the thermostat....wouldn't stop the heat anyways.

Quote:

Heating element fine by checking it connectivity
Also make sure it is not grounded.
http://www.applianceaid.com/grounded-elements-on-electric-dryers.php
Also check for proper power to the dryer.

jeff.

ccpyue 11-04-2012 12:34 AM

Whirlpool model#: YLER4634EQ1.
Though the Thermal Cut-Off has no connectivity, but I have tried to by-pass it by connecting the two Red wire without this Thermal Cut-Off, but Heating Element still no heating.

jeff1 11-04-2012 06:37 AM

Quote:

YLER4634EQ1
Could that be YLER4634PQ1

You should read 240 volts between the red and black wires, 120 volts between the white and black and 120 volts between white and red, check for this at the main power connection.

http://www.applianceaid.com/images/l...heckpoints.jpg

If you have no power at the heating element, remove power, remove wires to the heating element and isolate them so that they can't touch anything. Reinstall power and check each wire for power from the wire to the dryer cabinet, one wire will probably show 120 volts and the other will show zero. Make note of the color or # of the wire that has no power, remove power to the dryer and check the wiring diagram that comes with the dryer to find out where that color or # wire goes to. EG only!: - wires might be yellow and red, if the yellow wire (example only) was the one that had no power, look at the wiring diagram to find out where that goes to and check only those parts, no need to check the other colored wire parts as they are working.

jeff.

ccpyue 11-04-2012 08:01 AM

Hi Jeff, could you please tell me what is the "Thermal Cut-off (Hi limit thermostat)" use for. That is the one you marked as "1" in you diagram. Thanks.

Wuzzat? 11-04-2012 08:49 AM

Quote:

Originally Posted by jeff1 (Post 79549)
Then you have two issues/problems.

Agreed. What could the other issue be? :confused:

jeff1 11-04-2012 12:09 PM

Quote:

Originally Posted by ccpyue (Post 79557)
Hi Jeff, could you please tell me what is the "Thermal Cut-off (Hi limit thermostat)" use for. That is the one you marked as "1" in you diagram. Thanks.

If the heating element area gets too hot that will open to shut off the heat.

jeff.


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