Thread Number: 79234  /  Tag: Modern Dryers
High Limit Thermostat Top Filter Whirlpool Issue
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Post# 1031602   5/2/2019 at 19:39 by stricklybojack (San Diego, CA)        

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5-7 year old gas Whirlpool dryer keeps tripping the high limit. Lint filter clean, vent is clear.
Where do I look next?

Post# 1031604 , Reply# 1   5/2/2019 at 19:43 by Repairguy (Danbury, Texas)        

Model? Pictures? I sent you a couple of unrelated emails.

Post# 1031673 , Reply# 2   5/3/2019 at 09:56 by combo52 (Beltsville,Md)        
HI Limit Tripping

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The hi-limit resets automatically when it cools a little, are you talking about a Thermal Fuse ? If so there is probably one on the exhaust housing and it may have one at the top of the heater box depending on the model #


Post# 1031687 , Reply# 3   5/3/2019 at 12:40 by Maytag85 (Sean A806)        

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One thing that could be possible is a weak hi limit thermostat. I actually had a weak hi limit thermostat in my KM portable dryer, and I put a hi limit thermostat that would normally go in the full sized WP 29” electric as gas dryers, and it works much better now. I haven’t used that dryer in awhile since the drum belt broke, and the washer needs work since the timer knob broke off, and I need to figure out where to source replacement springs or spring mounts from.

Post# 1031872 , Reply# 4   5/5/2019 at 13:39 by stricklybojack (San Diego, CA)        

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The mystery is solved.
Went to the location and ran the machine...I had already asked if there was airflow at the exit vent and the response was AFIRMATIVE..tried to find the vent and check it it gets more interesting.
The vent exited the building no where near where I had been lead to believe. I asked, “is it by the entry way?” A 15’ ish distance from the dryer...well the “entry way” is very long, and the vent was oddly at the far end, over twice the distance from the dryer as I had imagined...and with very mediocre air flow being demonstrated..
They had already bought a new, matching, (old was a non matching WP) GE dryer they wanted installed even though I had said I will fix their old one gratis. Did the install, but vacuumed out the 30’ vent line as far as possible, 6’ maybe before we hooked up the new machine. I also shortened the indoor portion of vent line from 6’ to 2’ and called it a day.
However just now I found the real problem while tearing into the old dryer....
Any guesses?
Tik tok...
After testing, the proximite of “no heat” issue was revealed to be a toasted thermal fuse, the new high limit I previously installed was still good.
But this time I decided to open up the fan box...and OMG there finally was our main issue!
Or should I say tissue?
The inlet to the drum was covered 90+% of the way by a perfectly positioned white dryer sheet...I hadn’t even looked in the drum!
My bad, live and learn, and so on...but dang. Twice I had assumed, with the vent exit, and now that the operator would have caught something as obvious as a stray dryer sheet. But come to think of it, being a top filter machine, there would be less reason to inspect the drum interior.

Post# 1031882 , Reply# 5   5/5/2019 at 15:22 by combo52 (Beltsville,Md)        
Thermal Fuses On Clothes Dryers

combo52's profile picture

On Full sized WP built dryers there is always something wrong 90% of the time is one goes open, I am sure this has saved lots of clothing & dryer damage and thousands of fires.


I don't think it is possible for a dryer sheet to block the drum inlet. it would have to get inside the heater box to  do so.



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