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Forum Index => Dryer Repair => Topic started by: lalakelley on May 27, 2008, 08:50:39 PM

Title: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 27, 2008, 08:50:39 PM
Ok...so ya'll have helped me fix this dryer once before, well that worked GREAT! Now it won't heat nor will it shut off...before I couldn't get it to turn on now I can't get it to turns off. If I turn it on to dry(no matter what cycle) it will run "like normal"(without heating up) then when it gets towards the end of the cycle it just keeps going and going and going! Any ideas?! HELP?!?!

Model 110.64742400 (http://click.linksynergy.com/fs-bin/click?id=omv7WULuxaw&subid=0&offerid=225193.1&type=10&tmpid=2111&RD_PARM0=http%253A%252F%252Fwww.appliancepartspros.com%252Fmodelsearch_model.aspx%253Fmodel_id%253D5433739&RD_PARM1=http&RD_PARM2=%253A%252F%252Fwww.appliancepartspros&RD_PARM3=.com%252Fmodelsearch_model.aspx%253Fmodel_id%253D5433739)
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 27, 2008, 09:10:26 PM
If you're using the "Auto Dry Mode", it won't stop till they're dry.
 Won't happen if there's no heat.

Try it on "Timed Dry" to see if it stops at the end of the timed cycle.

How's the air-flow out the back of the dryer with the vent disconnected ?

You may have to do some tests with a meter...

Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 02:55:52 PM
It does it either way, timed or auto...I normally use timed and when you do that now it runs till you have about 2-5 minutes left and just stays there FOREVER...literally...it went for over 10 hours one day. I turned it on then left the house, returned like 10-11 hours later and it was still running. That time it did dry the clothes but they weren't warm when I pulled them out. So after that I started using the suto dry part. Which in the past I have had to run twice to dry a load, did the same thing ran till I shut it off. What do you mean air flow out the back?! I'll ask the man when he gets home to see :) We have a problem with our kitty ripping the lint hose thingy sometimes, but we fix it everytime...would that hinder the dryer from getting warm?!
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 03:10:06 PM
If the Timer gets stuck when in the Timed Dry mode, then the Timer is bad or the Centrifugal Switch on the Drum Motor

The cause of "no heat" when the Timer is running, is another problem.

How's the air-flow out the back of the dryer with the vent disconnected ?

... We have a problem with our kitty ripping the lint hose thingy sometimes, but we fix it everytime...would that hinder the dryer from getting warm?!
Are you talking about the vent hose ?

It should be rigid metal vent with maybe a small length of flexible metal vent - NO plastic.
And NO screws, foil tape only

Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 03:22:15 PM
Ours is flemsy looks like aluminum foil with a streghty coil in it...I know SOOO technical LOL sorry I'm not in this area, hints why I'm on here HAHA!!! So tell the hubby to check on what now?! And get him to take the vent hose?!?! off and check the air flow out the back right?!
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 03:30:51 PM
correct, and clean any lint build-up
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 03:59:27 PM
Then what?! he said he is going to take off the whole back of the dryer so I figure while he has it off if there is anything else he can do I'd find out before he takes the back off and puts it back on
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 04:08:44 PM
Ok so he just took off just the vent hose and it is blowing out fine, cold air tho :( Now what?!?! :-\
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 04:42:18 PM
Now some continuity or voltage tests will have to be done using the wiring diagram.

check the thermal devices in diagram

# 1 Thermal Cutoff Fuse (http://click.linksynergy.com/fs-bin/click?id=omv7WULuxaw&subid=0&offerid=225193.1&type=10&tmpid=2111&RD_PARM0=http%253A%252F%252Fwww.appliancepartspros.com%252FAppliance-Parts%252Fwhirlpool-dryer-thermal-fuse-item-number-ap3132867.aspx&RD_PARM1=http&RD_PARM2=%253A%252F%252Fwww.appliancepartspros&RD_PARM3=.com%252FAppliance-Parts%252Fwhirlpool-dryer-thermal-fuse-item-number-ap3132867.aspx)

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# 34 Hi-Limit Thermostat (http://click.linksynergy.com/fs-bin/click?id=omv7WULuxaw&subid=0&offerid=225193.1&type=10&tmpid=2111&RD_PARM0=http%253A%252F%252Fwww.appliancepartspros.com%252FAppliance-Parts%252Fwhirlpool-dryer-thermal-cut-off-kit-item-number-ap3094244.aspx&RD_PARM1=http&RD_PARM2=%253A%252F%252Fwww.appliancepartspros&RD_PARM3=.com%252FAppliance-Parts%252Fwhirlpool-dryer-thermal-cut-off-kit-item-number-ap3094244.aspx)

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Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 07:15:02 PM
Ok the continuity on both is fine and the voltage at all points on both is 120...what does this mean?!
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 08:00:17 PM
Continuity = good

120v to ground = can't tell because each side of the circuit is fed from a 120v line.

With the machine unplugged, disconnect one wire from either of those devices, then plug in the machine and turn it to dry, then measure each of those two wires to ground to see which side (wire color) isn't connected to a power source.
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 08:03:08 PM
Sending the men to do it now, they say it makes sense...doesnt to me  :o
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 08:08:37 PM
Ok so they did that...all together there are 4 wires, 2 on the fuse and 2 on the thermostat...they unplugged one of the fuse wires(top), when they tested the unplugger wire 120...when they tested the plugged in wire 0...then they plugged both in to the fuse. unplugged one from the thermostat, tested both wires and same result...now what?!
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 08:16:50 PM
... to see which side (wire color) isn't connected to a power source.
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 08:20:58 PM
IM CONFUSED...I know this is out of the ordinary but is there anyway i can talk to you via phone?! or IM?!
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 08:36:59 PM
not really,

What was the color of the unplugged wire that read 120v ?
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 08:50:56 PM
Both were red
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 08:59:30 PM
Did he check the resistance of the heater ?
Should read about 12 OHMS

Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 09:07:45 PM
Checking now...THANK YOU so much for all your help...is it the top or bottom wire or what color?!
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 09:11:49 PM
with dryer inplugged, resistance across the heater, should be Red and maybe Orange
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 09:14:55 PM
reads .2...wow am i glad i have men around the house all this technical stuff confuses me
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 09:18:12 PM
2 is OK, it may be the meter reading a little off...

OK, with the Hi-Limit thermostat disconnected, with the dryer runing, read the voltage at the wires to ground... and what colors ?

Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 09:21:05 PM
No not 2 .2.... as in almost 0...they told me to say 0 but i wanted to be specific
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 09:27:24 PM
The heater should either read 20 OHMS or bad = infinite (open circuit)

The meter may be on the wrong scale...

It can't read 2 or .2, unless he has the meter set at K OHMS

If it was 2 OR .2 it would blow the circuit breaker.
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 09:32:58 PM
To messure the OHMS should they tap it on each side or tap it on one side then go to ground?!
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 09:39:57 PM
with dryer inplugged, resistance across the heater, should be Red and maybe Orange
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 09:42:04 PM
They said its jumping all around from 1-12
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 09:43:44 PM

OK, with the Hi-Limit thermostat disconnected, with the dryer runing, read the voltage at the wires to ground... and what colors ?

Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 09:55:09 PM
Both voltage on red and pink are 0
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 09:59:41 PM
Both voltage on red and pink are 0
doesn't seem possible.. one side should probably read 120v...
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 10:01:39 PM
No i watched to make sure it was done right...unplugged both wires off the black thermostat and ran dryer tested both pink and red wire and both said 0...there is a white piece below it with one wire plugged into it are we supposed to be doing something with that
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 10:30:47 PM
No i watched to make sure it was done right...unplugged both wires off the black thermostat and ran dryer tested both pink and red wire and both said 0...there is a white piece below it with one wire plugged into it are we supposed to be doing something with that
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 10:35:41 PM
Sorry, I was still on page 2... There should only be (2) wires on # 15 Hi-Limit Thermostat

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Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 10:38:04 PM
Yeah that is what we pulled the wires off of and checked...with the red and pink wires...both showed 0 when we tested them with the dryer running
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 10:42:07 PM
and the dryer is set for "heat" AND it didn't run down to the "fluff" portion at the end of the cycle ?
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 10:47:42 PM
The one on the left is the thermostat?! cause that is on the top and the other one is on the bottom...i thought the one on the bottom is the thermostat...now im confused...we tested the one on the bottom, which you have a big picture of and the one on the right in picture of all the components....am i supposed to be letting it try to run a full cycle when we test it?!
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 10:49:24 PM
OK no wait the thing on the right in the picture with all the stuff we dont have...the fuse and thermostat look a LOT alike...but our fuse has a little prong thing on it like the one on the left in the 2nd picture...the first picture looks just like the thing that we tested the wires from
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 10:50:48 PM
Sorry but I have to laugh at the page 2 mishap i did that from page 1 to 2 i kept refreshing page 1 an we had went to page 2
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 10:52:38 PM
They may have changed the style, but each should nave (2) wires...

when doing that last test, the other one should stiil have the wires attached
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 10:54:53 PM
RIGHT...if you look at the back of the dryer you have the heater cover and a thermal fuse on top and the thermostat near the bottom near the heater coil looking thing RIGHT?!?!?! the one near the bottom which I thought was the thermostat is what we did the last test on...there is a white plastic piece below that which has 2 places to plug wires in and only has one red wire plugged into it, that is the wire i was confused about
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 28, 2008, 10:57:04 PM
Im going to go to bed now...will you be on tomorrow?!
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on May 28, 2008, 11:00:04 PM
I don't know about that other wire..

I may be here sometime tommorrow, other someone else may be around...

Also, check the voltage at the (3) terminals on the back of the dryer.

120v from each of the OUTER ones to CENTER
240v across OUTER ONES

With power cord unplugged, check to see if the terminals are tight.

Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: whirlpooltech on May 28, 2008, 11:32:53 PM
Can you post some photos of what your looking at and what your testing?
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 29, 2008, 08:08:40 AM
I could do that tonight hopefully...I'm at work right now, so I'm not near the dryer to test anything on it nor can I take pic :) But I will do what I can tonight...My hubby is to the point that he wants to just replace the thermal fuse and be done with it, but if that is not the problem then it won't work :-/
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 29, 2008, 08:44:35 AM
We tested the wires connected to #34 in this picture...since i am not home to take the pic I figured I'd use this one :)
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 30, 2008, 05:49:53 PM
Ok, UPDATE...My husband never tested those last things you suggested but has given up on all the test...he left to go get a new fuse and thermostat...he will be putting them in tonight so I will let you know how it works :)
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: JWWebster on May 30, 2008, 09:47:20 PM
#1 is likely gone bad as pictured. Luckily both 34 and number 1 come in the same package and they recommend both get replaced. Why? Because 34 is a 250f degree limit(resetable internally) and #1 is a 300f degree limit non-re-setable, Obviously the number 34 klixon failed to do it's job or more likely did it's job till it died due to poor venting problems or faulty control thermostats.
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on May 31, 2008, 07:41:59 AM
WELL...that didn't work, so today he is going to go get a new heating element, the thermal fuse and the other thermostat that is near connected into the vent housing thing. We figure this is going to work cause after that point we will have replaced almost everything on the dryer and have olmost a new dryer :)
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: Earl Dryer on June 01, 2008, 03:51:24 PM
Try this, I've had these small elements drive me crazy because they
test good but they are fused. Clip the test leads on each of they element terminals, set the OHMMeter to show a mid scale reading then gently shake the element back & forth up & down watch the
meter. I have 2 in the last month that were fused but would close back up when the cooled then open when they began to heat.
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: lalakelley on June 02, 2008, 08:28:10 AM
UPDATE  ;D He went to Sears on Saturday, to buy the thermal fuse(which they didnt have) other thermostat(which the didnt have either) and heating element(they had this). When he got home he replaced the heating element (http://click.linksynergy.com/fs-bin/click?id=omv7WULuxaw&subid=0&offerid=225193.1&type=10&tmpid=2111&RD_PARM0=http%253A%252F%252Fwww.appliancepartspros.com%252FAppliance-Parts%252Fwhirlpool-whirlpool-dryer-heating-element-item-number-ap3094254.aspx%253Fpn_%253D279838&RD_PARM1=http&RD_PARM2=%253A%252F%252Fwww.appliancepartspros&RD_PARM3=.com%252FAppliance-Parts%252Fwhirlpool-whirlpool-dryer-heating-element-item-number-ap3094254.aspx%253Fpn_%253D279838) and the dryer works GREAT. Better than when we first bought it :) Thank you though for all your help


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Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: AJ on June 02, 2008, 04:40:56 PM
Glad to hear you got it repaired.

Thanks for the update.
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: johnbessa on November 23, 2011, 02:19:21 PM
I see that you guys are testing with the machine on.  I had a no-heat problem (after replacing the belt) that I successfully traced using "a continuity tester" which was the OHM reader on an up-to-date (yellow w/ battery) volt meter.  I needed a helper when the wires went from the back to under the drum where the motor is.  (Drum was out.)

I strongly NOT suggest using full power for testing continuity (but OK on cars w/ 12v) esp if there is a possibility of a kid or pet touching the inner parts, but using an OHM meter.  You can make one by wiring a flashlight bulb to a battery with one wire, and to two nails from the batter and the other lead of the light bulb (which I have done many times).

John
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: JWWebster on November 23, 2011, 04:22:04 PM
I don't suggest ever checking anything with it plugged in. The correct procedure is to remove wires from each component and check em for continuity. The open component is the bad component. Nothing needs to be plugged in to be checked. Even if you had an idiot light and checked each component that would not prove a part was ok UNLESS you yank one wire off each component and check for power between that wire and the component with the machine running. That is just plain dumb. Trust me. Been there done that.  :rofl:
Title: Re: Kenmore 70 series electric dryer...wont heat
Post by: RegUS_PatOff on November 24, 2011, 02:40:03 AM
I usually test with voltage applied
no need to disconnect anything
i.e. Electric Dryer Heater circuit...
voltage here... voltage here... voltage here... voltage here... oops .. no voltage here. . !