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Bosch dryer won't stay running - sometimes

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Dryer is 1.5 yrs old and started acting up a couple weeks ago; but not all the time - it

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Old 03-02-2008, 03:17 PM
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Default Bosch dryer won't stay running - sometimes
Model Number: WTMC4300CN   Brand: Bosch   Age: 1 - 5 years   

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Dryer is 1.5 yrs old and started acting up a couple weeks ago; but not all the time - it works fine for a couple loads, then won't stay running in any mode (timed drying or automatic drying).
Dryer will run for about 30 seconds, then stop - no error on the display.
Cleaning the moisture sensors sometimes fixes it...Letting it sit for a few minutes sometimes fixes it.
Should I consider replacing the moisture sensor.
Can anyone supply a wiring diagram for my dryer.

Thanx,
Justin


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  #2 (permalink)  
Old 03-03-2008, 02:14 PM
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Hi Justin,

The first failure suspect is a clogged exhaust line which caused the dryer to overheat.

Gene.
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Old 03-03-2008, 04:38 PM
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Thanks for the response Gene.
I actually already checked the exhaust line and it's perfectly clean.
Could it be a defective thermal switch?
Or should check something else?

Thanx,
Justin
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Old 03-03-2008, 05:05 PM
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Possible the moister sensor is causing the problem.

The model number you posted does not come up. Verify and repost it, please.

Gene.
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Old 03-04-2008, 06:59 AM
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Model number is confirmed to be WTMC4300CN, Bosch Nexxt DLX Series Electric Dryer.
It's a Canadian model - the US equivalent is WTMC4300US.

Can I simply jumper the moisture sensor to bypass it?
Does it provide a variable resistance or some other measurement to the circuit board?

Thanx,
Justin
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Old 03-04-2008, 01:23 PM
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Justin,

You can not bypass the moister sensor - the control board is going to be confused. It controls the sensor by reading the proper resistance.

I would recommend to call an authorized Bosch tech because the problem you described is not a regular and it is not on the troubleshooting list.

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Old 04-01-2008, 06:41 PM
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As it turns out the problem was with the door switch - the one screw holding the door sensor in place was slightly loose, just enough to shut down the dryer after a couple minutes of tumbling and clothes bumping against the door.
Go figure....
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Old 04-01-2008, 08:44 PM
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I'm glad you were able to fix it.

Gene.
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