Author Topic: Whirlpool Dryer Stopped Drying (LER8858EQ2)  (Read 14139 times)

Offline JWWebster

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Re: Whirlpool Dryer Stopped Drying (LER8858EQ2)
« Reply #10 on: March 25, 2008, 02:12:58 PM »
Change that bias thermostat.
It obviously is not working.

WHIRLPOOL Dryer Cycling Thermostat, part number: AP3131939


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Offline Agrajag

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Re: Whirlpool Dryer Stopped Drying (LER8858EQ2)
« Reply #11 on: March 25, 2008, 04:32:16 PM »
Thanks. Keep the fingers crossed. The Bias, cut-off and the other one from that kit are all replaced now (with the kit being the second round) and it's drying a load now. It started off hot so we'll see what happens.

I did notice that the bias thermostat was totally covered by a white thick powder that was on there pretty good. I was thinking that might be the cause of it "failing" while still being able to show conductivity.

My main question is, is there a way to know in the future that this was the problem so that I could have saved spending $28 for the kit twice?

Offline Repair-man

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Re: Whirlpool Dryer Stopped Drying (LER8858EQ2)
« Reply #12 on: March 25, 2008, 07:56:27 PM »
The rule of thumb in an overheating dryer is to replace the operating thermostat first, since it is the first line of defense regarding temperature. That is, of course, after checking that your vent was not to blame. Thermal cutoffs fail as a last resort to keep your house from burning down, but they are only the result, not the cause..
« Last Edit: March 26, 2008, 05:41:43 AM by Repair-man »
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Offline Agrajag

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Re: Whirlpool Dryer Stopped Drying (LER8858EQ2)
« Reply #13 on: March 25, 2008, 08:49:09 PM »
Ah, okay, so the take-away to learn here is that the odds are that the cut-off thermostat was only failing due to overheating? Obviously from my side I never saw that as when I'd see the dryer heat was entirely absent. heheh

Offline BrntToast

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Re: Whirlpool Dryer Stopped Drying (LER8858EQ2)
« Reply #14 on: March 26, 2008, 09:58:40 PM »
test one more thing....

continuity test between each lead on the heater to the metal heater housing(your looking for part of the heater shorted to ground from breakage or a foreign object)

if the heater is shorted it can bypass the operating thermostat and cause the dryer to overheat tripping the thermal fuse
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Offline Agrajag

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Re: Whirlpool Dryer Stopped Drying (LER8858EQ2)
« Reply #15 on: December 11, 2009, 01:56:13 PM »
Here we are again with the same dryer and no heat again.

A quick check shows everything (but the bias) zeros with the exception of the white strip below the high limit thermostat.

I haven't checked the bias/cycling stat yet. Wanted to check in and find out of that white strip below the high limit stat is a thermostat or not. It's the one that hooks into the heating element. It's the one that the heating element wire connects to (part 19). That little white strip won't zero out. However, I also don't see it's part. In a sectional it shows as being there with the heating element wire but in the parts list it just shows as the wire.

Offline JWWebster

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Re: Whirlpool Dryer Stopped Drying (LER8858EQ2)
« Reply #16 on: December 11, 2009, 02:04:41 PM »
If any of these limits are open or the element is open then you won't have any heat. To prevent a bad reading remove the wires on each component before making a continuity check.
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Offline Agrajag

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Re: Whirlpool Dryer Stopped Drying (LER8858EQ2)
« Reply #17 on: December 11, 2009, 03:48:29 PM »
Yeah, I always do. No heat what-so-ever. All thermostats reading as expected though I suspect the bias might be an issue as it's reading the same as it did a year ago and I think it might have been bad then. (green wires connections zero out North/South while purple wire connects read 7 as before)

Offline RegUS_PatOff

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Re: Whirlpool Dryer Stopped Drying (LER8858EQ2)
« Reply #18 on: December 11, 2009, 03:58:07 PM »
click on picture

WHIRLPOOL 3392519 Dryer Thermal Fuse, AP3132867




How's the Vent ?
Check for good air-flow where the Vent exits the House.

Dryer Vent
Vent should be rigid metal.
Short lengths of flexible metal may be OK, if not crimped when moving the Dryer into place.
NO plastic
NO PVC
NO screws
Foil Duct Tape is OK.
With an empty load, Timed Dry, High Heat, the vent temperature should cycle somewhere between 135F and 160F at the rear of the Dryer.
« Last Edit: December 11, 2009, 03:59:39 PM by RegUS_PatOff »
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Offline Agrajag

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Re: Whirlpool Dryer Stopped Drying (LER8858EQ2)
« Reply #19 on: December 11, 2009, 04:39:06 PM »
Aha! If the picture above is of the piece that goes below the bias themostat (though it doesn't match the look of the piece that's on there as the one on there has a screw right in the center of it to hold it onto the blower housing) then that's it as this doesn't zero out.

Vents are all fine.

 

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