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Kenmore Series 80 dryer won't turn off  Rating:  Rating
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 Posted: Tue May 30th, 2006 02:46 pm
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BBQdrew
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Hello all,

I have a Kenmore Series 80 dryer (110.62722101) that will not turn off. I've replaced the timer, but that didn't fix it. The electrical diagram in the cabinet is clear as mud, as it applies to several dryers.

I'm guessing the moisture sensor in the lint/exhaust tube is bad. Trouble is, the electrical diagram doesn't refer to it as such.

Any ideas? My wife likes her steaks well done, but not the clothes!

Thanks!
Andy
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 Posted: Tue May 30th, 2006 05:55 pm
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Pegi
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I assume the dryer does heat?  When you say "does not turn off" does it not advance in automatic and timed dry both?  Or does it go to the off, thru the off and on to the next cycle and keep running..



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 Posted: Tue May 30th, 2006 06:01 pm
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BBQdrew
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It heats just fine, but the timer does not advance in either automatic or timed dry. If left unattended, it will run for hours (not good!).



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 Posted: Tue May 30th, 2006 06:08 pm
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Pegi
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Here is your wiring sheet, top one for an electric dryer and the bottom one for gas models..



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 Posted: Tue May 30th, 2006 06:13 pm
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Pegi
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So replacing the timer did not work?  If the moisture sensor was bad do not believe would effect the timed dry, let me see what is in your model...



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 Posted: Tue May 30th, 2006 06:27 pm
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BBQdrew
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Correct, replacing the timer did not help. :-(



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 Posted: Tue May 30th, 2006 06:32 pm
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Pegi
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Is this the timer you replaced?  Looks like one of the timers with the 240 volt timer motor which would eleminate the resister in the circuit, if there is not 240 volts to the timer motor it will not advance do not believe..however you would not heat either if there was not 240volts to the dryer....timer # 8299784...this dryer would advance in the auto circuit when the heating element shut off and stop advancing when the element is on, we assume the element is cycling on and off???   If not that should not effect the timed cycle however, just the auto cycle.....we will wait for more input from others....



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 Posted: Tue May 30th, 2006 07:37 pm
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BBQdrew
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Looks like it...but I'll have to get home and check it later.

Thanks!
Andy
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 Posted: Wed May 31st, 2006 01:22 am
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BBQdrew
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Okay, here's what I've found: the model number on the replacement switch is the same (M460G). The specs are the same as well, but the number you provided (8299784) is replaced by 3976577. Some of the other numbers are different as well. Given that the model number and specifications are identical, I'm confident (hopeful?) that this is the proper replacement switch.

Again, the behavior is as follows: The dryer will start and heat just fine, but the timer does not advance in any mode (auto or timed). Given that a replacement timer did not solve the problem, my next guess is whatever moisture sensing system this dryer uses.

Thanks again for all of your help!
Andy



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 Posted: Wed May 31st, 2006 01:30 am
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Pegi
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I see no moisture sensor in your wiring diagram, do you in fact see one in your dryer??  I did not see one in the breakdown in the Sears site either.....any one else have some suggestions???  I do not have a clue here...



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 Posted: Thu Jun 1st, 2006 01:33 am
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BBQdrew
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I don't see a moisture sensor on the diagram either...I was just making an assumption that there is some sort of sensor to determine when the load is dry. It's an Auto Dry system, so there's gotta be something that does it.

Any ideas?

Thanks!
Andy



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 Posted: Thu Jun 1st, 2006 04:02 am
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Pegi
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The timer advances in the auto dry cycle by giving power to the timer motor thru the heat circuit when the element cycles off on the cycling thermostat, when the element is on no power to the timer motor..as the load gets dryer the element cycles off more often and the timer advances faster to the off position..however this would not have any effect on the timed dry cycle as it does not advance thru the heat circuit....that is why I was making sure your timer has the 240 volt timer motor as these do not have the resister in line with the heat circuit...same principle just different parts...



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 Posted: Fri Jun 2nd, 2006 03:04 am
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Samurai Appliance Repair Man
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Very erudite description of the power control circuit in a dryer, Pegi! :dude:



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 Posted: Fri Jun 2nd, 2006 03:40 am
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Pegi
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:cool:



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 Posted: Wed Jun 7th, 2006 10:55 pm
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DrFrige
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Stupid question for you.. How is the air flow through the exhaust?

 

 

Oh wait... you said timed dry doesnt advance either huh?

Hmmmmmm

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 Posted: Thu Jun 8th, 2006 01:45 am
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BBQdrew
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There's no such thing as a stupid question! :P

The air flow actually seems pretty good. I have another dryer running in its place right now...one that actually turns off when it's done! You make a good point, and it is one worth checking out. At this point, I'll take any and all suggestions. I'm also going to hook up the problem-child dryer again and go back to confirm exactly what's going on.

I'll keep you posted when I've gotten it done.

Thanks!
Andy



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 Posted: Thu Jun 8th, 2006 02:36 am
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BBQdrew,   I think you might have to replace that  in line power resistor.  They eliminated it on the newer dryers with auto dry.  The 230V timers cannot be used in a dryer with a power resistor.  The 120V.  timers cannot be used in a dryer without the resistor.  I got stung on this problem twice.  On the orange wire I had to cut out the resistor and wire in a new one.   I can't remember the part number,  will try to look it up...Ron

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 Posted: Wed Jun 21st, 2006 02:31 am
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BBQdrew
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Hi! I'm back and working on this again. I'm not sure what you mean by "I think you might have to replace that in line power resistor". If you refer to the electrical diagram that's linked above, there's noting that I see listed as a resistor. Please forgive me, I'm not an electical engineer.

I dug up my old multimeter and was able to do some testing. Here's what I was able to do tonight: Again, looking at the diagram, I checked the "Thermal Fuse Not Resettable" with the blue wire to each side and it checked good. I then checked the "Thermostat Heater" (violet on both sides), and it showed just over 7k ohms (supposed to be 5600-8400 ohms). I also checked the "Thermal Cutoff Not resettable" and it appears to be good as well...but I'm not completely confident that a continuity test was the right test here.

I don't have power to the dryer at the moment. Are there tests I need to perform that require the power on?

Any additional info you can provide will be greatly appreciated. I have a temporary dryer in place, but it's really not very good. When this one works, it works very well.

Thanks!



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 Posted: Fri Jun 23rd, 2006 10:54 pm
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BBQdrew
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Here's a little more information. I hooked the dryer back up to power, and verified that the timer does not advance in timed, auto, or air dry mode. The timer is, in fact, a 25A, 250V (HTR) timer, with the exact same specs as shown in the picture you showed above. Oh yeah, I also checked the dryer vent hose, and it's clear.

I hate to call a serviceman, but at this point, we may be reaching desperation.

Any information or ideas you may have are, as always, greatly appreciated!

Thanks!
Andy



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