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110.96281100 Kenmore dryer - thermal cut off fuse, why?

paulmars

Premium Member
Joined
Nov 4, 2014
Messages
21
Location
house
Model Number
110.96281100
Brand
Sears Kenmore
Age
More than 10 years
Why is it needed? Ive only repaired a few dryers, but this looks like extra part. This dryer has the std High-Limit Thermostat, Operating Thermostat, and Thermal Fuse. However, it also has this Thermal Cut-Off Fuse. This Thermal Cut-Off fuse is located in the heater housing where it feeds the drum and looks more like a thermostat. Its also the most expensive part.

279769 Thermal Cut-Off Kit


See attached diagram. ( )

#1 Thermal Cut-Off Fuse

#34 High-Limit Thermostat

#42 Operating Thermostat

#59 Thermal Fuse

kenmore 110.96281100

tks,
pa

(age is required, but I dont know. brand is required twice, why I dont know.)
 

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paulmars

Premium Member
Joined
Nov 4, 2014
Messages
21
Location
house
Ive watched several troubleshooting videos for this specific model troubleshooting for no heat. Each video tested the High-Limit Thermostat, Operating Thermostat, Thermal Fuse, heating element. One of the videos tested the timer. None tested or even mentioned the Thermal Cut-Off Fuse.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
105,987
Location
McMullen Valley, Arizona
The thermal cut-off (thermal fuse) 360 degrees and high-limit thermostat 250 degrees.

The thermal fuse is a safety device designed to protect the dryer from overheating and catching fire.

It's very simple, you ohm test the thermal cutoff just like you would a thermal fuse. Same with the high-limit thermostat. Both should read 0 ohms when they are good.

Jake
 

paulmars

Premium Member
Joined
Nov 4, 2014
Messages
21
Location
house
Before I purchase new cut off, I decided to test the two thermostats:

one is marked L155-25F. it opens at 110°F.

the other L250-80F. it opens at 180°F.

Some sites say that number after the dash is +/- for opening temperature. Other sites say that is how much less the temp needs to be for closing. I dont know which sites are correct.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
105,987
Location
McMullen Valley, Arizona
You don't need to worry about temperature on these thermal fuses and high-limit thermostats, just as long as they ohm test good for continuity.:)

Jake
 

Dan O.

Appliance Tech
Staff member
Joined
Oct 9, 2004
Messages
2,418
Location
Canada
paulmars said:
one is marked L155-25F. it opens at 110°F.

the other L250-80F. it opens at 180°F.

Some sites say that number after the dash is +/- for opening temperature.
The L155 is the temp in F. it is designed to open at. It is set to close again once the temp decreases 155-25 = 130 close. 250-80 = 170 F. close. The 25 and 80 respectively is the temp. deferential between open and closing again. Cycling thermostats have a narrower differential than safety thermostats.

JFYI
 
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