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Kenmore 110.60932990 won't heat

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Posted: Sat Oct 31st, 2009 03:40 am

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danix
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Man, am I frustrated.
OK, here's the saga. Kenmore aka Whirlpool "Even Heat" dryer.

Dryer won't heat but otherwise runs fine. Checked exhaust vent, fine. Do lots of googling.
Unplug, remove back panel, realize that does nothing but loosen the drum, so I replace those bolts, then remove the lower front panel.
Test the thermal fuse, has continuity. Test the thermister, does not have continuity. Decide this is the problem, buy part locally ($28). Notice that the new part also does not have continuity - odd? Resistance of the two parts is slightly different. Replace thermister, no difference.
Test heater element. Has continuity, resistance is OK (from memory, around 9k ohms?)
Test thermal cutoff, high level thermostat by heating on stovetop. Both check out OK. I know they only handle cutoff at high temps, but I wanted to test them anyway.
Do more googling, find this forum. Decide it's the "Even Heat" control board. Remove top panel and discover the hidden repair pages. Run through built in diagnostics, all check out. Test voltage at heater relay across P3-1 and P3-2, voltage is low, around 38VDC. More convinced it's the board.
Find board locally ($70) and replace it. No difference. Rechecked voltage as in previous step, it's now 48 VDC, but no change in heat output.
Buy my membership so I can post here, tail between my legs, hoping for help.

Am I missing something really simple here?

Last edited on Sat Oct 31st, 2009 03:58 am by danix

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Posted: Sat Oct 31st, 2009 04:01 am

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RegUS_PatOff
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Thermistor is a "variable resistor" that senses temperature ...
about 12 k OHMS at ambient

Heater Element should be about 10 OHMS

Relay test P3-1 to P3-2 will test the Relay Coil voltage, but won't tell you if the Relay is operating, or if the Contacts are good.

You could try swapping the (2) Relays to see if the Motor will then not run ....

110.60932990 Tech Sheets

also:

Any part ordered from RepairClinic can be returned in original condition
within 30 days for a refund (less shipping).

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Posted: Sat Oct 31st, 2009 04:19 am

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danix
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Thanks, those are the same sheets I found inside the control panel. Point taken about repairclinic returns, but as I said, I bought locally to save time.

Can I bypass the relay to test it? I'm guessing not.

I see your point about switching relays, but that still won't tell me if I'm getting heat, though it would be a natural conclusion.

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Posted: Sat Oct 31st, 2009 04:33 am

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danix
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OK, swapped the two relays. Motor runs as normal, no heat.
Pulled the lower panel again and rechecked the heating element. 9.9 ohms. One thing - with the system running, shouldn't I be able to measure voltage across the two ends of the element? I get nothing across the element or across the two leads that go into it (red/white, red).

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Posted: Sat Oct 31st, 2009 04:41 am

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danix
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Couple more tests - confirmed:
- continuity at thermal fuse (normal)
- no continuity at thermister (normal)
- no continuity at thermal cutoff. Is this normal?
- continuity at high limit thermostat (normal)
- continuity at heater element

The only thing I haven't checked, looking at the diagram, is that there's a centrifugal switch in the motor that is also an input to the heating circuit? Not sure where to find this.

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Posted: Sat Oct 31st, 2009 04:58 am

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RegUS_PatOff
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danix wrote: - no continuity at thermal cutoff. Is this normal?

should have continuity, although it's a thermal fuse.

If you tested it by heating it, you could have blown it.

(could be by-passed during testing)

Yes, you could by-pass the Heater Relay ..

jumper:

big Red Wire to big Red Wire

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Posted: Mon Nov 2nd, 2009 01:09 am

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danix
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RegUS_PatOff wrote: danix wrote: - no continuity at thermal cutoff. Is this normal?

should have continuity, although it's a thermal fuse.

If you tested it by heating it, you could have blown it.

Bingo. Yep, I blew it. So I think the final culprit was the "Even Heat" board.
Wasted money on the thermister and blowing the thermal cutoff, but even so, learned a lot and save a ton on the repair costs.

Many thanks for the replies!

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