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Author Topic: Kenmore 70 Dryer no heat  (Read 238 times)

Offline digifoss

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Kenmore 70 Dryer no heat
« on: January 01, 2020, 08:29:22 PM »

Hello all, new guy here.  I have a Kenmore series 70 dryer that runs but doesn't heat.  I bought it about 6 months ago and has worked fine until yesterday when it quit heating.  I called the appliance store where I bought it, they had me take it over.  When they moved it into their shop and plugged it in, it worked fine and heated normally.  Let it run a while, stopped and started it several times, unplugged and plugged in and tried a few more times and it works fine every time.  Appliance tech told me I must have a tripped breaker or one side of the breaker tripped at home.  Brought it home, plugged in and it doesn't heat.  Reset the dryer breaker several times, tried again and no heat.  Got a volt meter and tested the voltage at the receptacle and I get 120V across the red and white, and 120V across the black and white.   So now I am stumped, I have 120 Volts on both legs but no heat, yet it heats at the appliance store.  What should I check next.

Offline manden

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Re: Kenmore 70 Dryer no heat
« Reply #1 on: January 02, 2020, 04:06:13 AM »
First you have to check for 240 volts Black to Red.

Second you also have to check at the terminal strip in the unit just in case the line cord is bade.

Offline digifoss

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Re: Kenmore 70 Dryer no heat
« Reply #2 on: January 02, 2020, 10:11:47 AM »
Thanks, will do today.  So the motor uses 120V and the heat side uses 240V ?  Appliance tech told me one 120V leg was for the motor and the other leg was for the heating element.  It makes sense the heating side needs 240V.

Offline manden

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Re: Kenmore 70 Dryer no heat
« Reply #3 on: January 02, 2020, 10:31:16 AM »
"So the motor uses 120V and the heat side uses 240V ?"
Yes

Never let that appliance tech near any of your appliances!!!!!!!!!!!!!!!
 

Offline digifoss

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Re: Kenmore 70 Dryer no heat
« Reply #4 on: January 02, 2020, 10:36:45 AM »
Also, at the shop, they ran the dryer with the vent hose off, I haven't tried that.  Could that cause it to not heat if the hose or vent cap was somehow restricting the air flow ?

UPDATE:  Just tried it with the hose removed and it didn't make any difference.
« Last Edit: January 02, 2020, 10:52:04 AM by digifoss »

Offline manden

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Re: Kenmore 70 Dryer no heat
« Reply #5 on: January 02, 2020, 10:53:01 AM »
No it will not cause no heat.

If you had a vent problem then what usually happens is that the heater would work once then the thermal fuse would blow due to overheating. Then it would no longer run at all.

I might be possible for the thermal cut-off to blow but it would cycle for some time before that happened.
But this is unlikely.

Offline digifoss

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Re: Kenmore 70 Dryer no heat
« Reply #6 on: January 02, 2020, 01:15:41 PM »
I checked the voltage across the red and black wires at the wall receptacle and get 240 volts.  Pulled the cover off the back of the dryer and found all screws tight, and all wires fastened snugly.  I noticed that the red and black wires were reversed on the termination block so I reversed them back to black to black and red to red.  I took the termination block out and inspected end connectors and general condition of the wires and the termination block, everything looked in excellent condition.  Put it all back together, checked the voltage at the termination block one more time, still get 120V black to white, 120V red to white, and 240V black to red.  Put it all back in place and it still blows cold air.   :'(

Offline dab147315

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Re: Kenmore 70 Dryer no heat
« Reply #7 on: January 02, 2020, 03:01:19 PM »
Put the dryer on a heating cycle and ( Run)  the dryer while checking the voltage at the Dyers terminal block.See if you get the same readings. You may have  the proper voltage there without putting a load on the circuit but could go away as the circuit is loading down. This type of meter puts a load on the circuit and will vibrate light up so you know both legs of the circuit can do work.
 [size=78%]https://www.amazon.com/Ideal-Industries-61-085-Vol-Test-Solenoid/dp/B000NBCD1K/ref=pd_sbs_469_t_0/147-5466359-3966446?_encoding=UTF8&pd_rd_i=B000NBCD1K&pd_rd_r=9d12bfe9-964a-47a8-b042-755b5ed88185&pd_rd_w=TkR5S&pd_rd_wg=7QrDN&pf_rd_p=5cfcfe89-300f-47d2-b1ad-a4e27203a02a&pf_rd_r=14CBF5GF27KCDWW00TA1&psc=1&refRID=14CBF5GF27KCDWW00TA1[/size]

Offline digifoss

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Re: Kenmore 70 Dryer no heat
« Reply #8 on: January 03, 2020, 11:08:01 AM »
Thanks guys for your assistance, it is much appreciated.  I got an electrician friend to come look at it and he found the problem.  One of the coils in the heating element was burned or broken in two.  The two ends were still together and it was hard to find so I think moving it around could have allowed it to work that one time.  Anyway  I picked up a new one this morning and now it's working fine.   ;D

Offline manden

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Re: Kenmore 70 Dryer no heat
« Reply #9 on: January 03, 2020, 03:30:09 PM »
Glad to hear you are up and running.

Thanks for getting back to us.