Author Topic: Kenmore 70 Dryer will not heat  (Read 3452 times)

Offline samiam

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Kenmore 70 Dryer will not heat
« on: September 01, 2009, 04:03:30 PM »
Unit ignites runs for 35 seconds shuts down.  I have replaced coil valves, no luck.  Checked continuity of radiant sensor good.  Machine exhaust way is clear of lint.  Any suggestions?

Model 110.72722100

Offline Repair-man

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Re: Dryer will not heat
« Reply #1 on: September 01, 2009, 04:42:57 PM »
If the unit does the same thing when you remove the vent hose completely, then change the thermal cutoff and hi-limit thermostat. Be sure not to run the dryer with the front off, or it will cycle off on hi-limit.

Hi-Limit Thermostat- click
« Last Edit: September 01, 2009, 06:20:39 PM by Repair-man »
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Offline samiam

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Re: Kenmore 70 Dryer will not heat
« Reply #2 on: September 01, 2009, 06:34:46 PM »
Hey repairman thanks for the info.  Still have the problem  Found the hi limit thermostat will replace.  Is the thermal cut off located on the exhaust air duct?  Thanks again.

Offline Repair-man

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Re: Kenmore 70 Dryer will not heat
« Reply #3 on: September 01, 2009, 06:52:28 PM »
  Is the thermal cut off located on the exhaust air duct?  Thanks again.

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Offline samiam

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Re: Kenmore 70 Dryer will not heat
« Reply #4 on: September 03, 2009, 04:02:09 PM »
I replaced both the thermal cutoff and the hi limit thermostat still cuts off after 30 seconds.  What should I look at next? 

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Re: Kenmore 70 Dryer will not heat
« Reply #5 on: September 03, 2009, 04:12:22 PM »
At this point, I would be perched behind your dryer with my voltmeter on the operating thermostat terminals, seeing if it was opening the circuit when the gas shuts off. A lot of this requires technical experience, so you may be better off calling in someone rather than throwing parts at it all day hoping one of our suggestions will work :)
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Offline TJW

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Re: Kenmore 70 Dryer will not heat
« Reply #6 on: September 03, 2009, 04:18:50 PM »
Sounds like a hairline crack in the igniter. When hot it wonít fire off again until it cools down enough. Had it happen to me, and I was as stumped as you are.

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Re: Kenmore 70 Dryer will not heat
« Reply #7 on: September 03, 2009, 04:37:55 PM »
Please, if you are not a technician, it's best not to confuse the situation.

If the ignitor was cracked it would not light. The unit lights fine, it just does not stay on long enough....not an ignitor issue.
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Offline TJW

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Re: Kenmore 70 Dryer will not heat
« Reply #8 on: September 03, 2009, 04:43:25 PM »
I spent 11 years as a tech-care technician for Whirlpool. Many service calls on coin-op laundry equipment. Iíve seen this one twice.

Offline Repair-man

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Re: Kenmore 70 Dryer will not heat
« Reply #9 on: September 03, 2009, 05:22:51 PM »
I'm impressed.. maybe you should stay with this person until the situation is resolved.
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Offline samiam

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Re: Kenmore 70 Dryer will not heat
« Reply #10 on: September 03, 2009, 05:40:41 PM »
I think I have reached the end of do it myself.  I have learned alot about dryers but it still is not working time to call a pro.  Thanks for all the input, I will post to let you know what the final problem ends up being.

Offline JWWebster

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Re: Kenmore 70 Dryer will not heat
« Reply #11 on: September 03, 2009, 07:34:28 PM »
Dude change out the ignitor and see what happens before you call anybody in.
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Re: Kenmore 70 Dryer will not heat
« Reply #12 on: September 03, 2009, 07:36:02 PM »
Yep, throw another log on the fire. JW, how does an ignitor expain his complaint?
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Offline JWWebster

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Re: Kenmore 70 Dryer will not heat
« Reply #13 on: September 03, 2009, 07:39:59 PM »
An ignitor ain't as much money as a service call AND sooner er later he gonna need it. Therefore If TJ thinks that will solve it I would go for in a heartbeat before calling in a guy who most probably would be just as stumped and would begin the part changing thang. What you thank Kimosabe, you IS da man Jimbo.
« Last Edit: September 03, 2009, 07:45:53 PM by JWWebster »
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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.
I love fan letters! LOL

Offline Repair-man

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Re: Kenmore 70 Dryer will not heat
« Reply #14 on: September 03, 2009, 07:59:35 PM »
Bless your heart...did you read the first line of the original post?

Quote
Unit ignites runs for 35 seconds shuts down

Now, besides the obvious admiration you have for TJ (which I do not share), you know in your own mind that:

1. If it was the ignitor, it would not lite in the first place
2. Once the ignitor glows, the radiant sensor take the ignitor completely out of the picture and diverts the voltage to the valve coils. The unit will heat from then on until something else interrupts the circuit.
3. If anything, there is a loss of voltage, either from the radiant sensor (highly unlikely), the operating thermostat (very likely) or the blower housing is stopped up, causing the hi-limit to trip out.

Do you really think this person should invest in an ignitor now? If so, you should buy it for him.
"It's only expensive if someone else fixes it for you" -
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