Author Topic: why didnt the hi limit blow?  (Read 1912 times)

Offline kellonnie

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why didnt the hi limit blow?
« on: April 07, 2010, 06:13:10 PM »
one of the heating element coils drooped and was touching the metal causing the heating element not to turn off, as long as the dryer was in the on position even when it wasnt running. it got so hot it melted the rear panel. my question is, why didnt the hi limit blow?

Model 110.62622101

Offline JWWebster

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Re: why didnt the hi limit blow?
« Reply #1 on: April 07, 2010, 06:37:38 PM »
The limit measures ambient temp not amp draw. Since the electricity is traveling from L-2 to earth their is no loop and even though the element is hot it can't increase in temp due to the resistance from the frame. It will get hot enough to melt or warp stuff however. That is my theory, I may be wrong, if I am someone will post a comment.
« Last Edit: April 07, 2010, 06:43:28 PM by JWWebster »
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Offline jumptrout51

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Re: why didnt the hi limit blow?
« Reply #2 on: April 07, 2010, 07:09:27 PM »
Sounds believable to me JW.
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Offline RegUS_PatOff

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Re: why didnt the hi limit blow?
« Reply #3 on: April 07, 2010, 07:29:39 PM »
OR ...

The Thermal devices are in the L1 line ...
whether they "open" or not, when the Heating Element shorts to chassis, it's still powered by the L2 line.

110.62622101 Wiring Diagram
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Offline JWWebster

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Re: why didnt the hi limit blow?
« Reply #4 on: April 07, 2010, 07:45:22 PM »
Yes of course L-1 (I stand corrected) would go through the timer side of the circuit whereas L-2 is blocked by the cent switch. You are on your toes Reggie!
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About the icons: The beer is tip link, if a tech saves ya some money buy em a 6 pack. The small green square=personal message. The green dot is a link to my web page on appliance repair and other general BS I love to post. The letter sends me email.
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Offline magician59

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Re: why didnt the hi limit blow?
« Reply #5 on: April 08, 2010, 12:49:31 PM »
I've seen this happen a lot...seems like the designers would include (yet another) safety to switch out the L2 side when the element grounds. BTW: this is why I never leave the house while my dryer's on.

 

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