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ViperMI  
#1 Posted : Friday, October 18, 2013 9:33:49 AM(UTC)
ViperMI

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I Have a Estate Model # TEDS840PQ0 electric dryer. My problem is that the auto sensing doesn't quite work well,, leaving clothing damp.

I replaced the Heating Element assembly, the Thermal Cut Out fuse kit, and the Cycling Thermostat.

I have cleaned the unit thoroughly inside and out. Vents,etc.

If I put it on the timed cycles it seems to work fine,, just problem with the Auto Sensing Selection.

Did I miss anything? Maybe another part that controls the auto sensing function????
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denman  
#2 Posted : Saturday, October 19, 2013 3:24:17 AM(UTC)
denman

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Here are your parts
Parts for Estate TEDS840PQ0 Dryer - AppliancePartsPros.com

See the attachment for the wiring diagram.

The unit use what could be called a poor mans auto sense.

In timed dry the timer gets power direct from the line (L2 , Timer Switch 0 OR/TM , Timer Motor , Timer contacts BU/BK , L1) so whenever the the timer is not at off it will advance.

In auto mode the timer motor only gets power when the heater is off (L2 , Heater , Timer Switch 0 WB/TM , Timer Motor , Timer contacts BU/BK , L1).
Note that when the heater is on you have L1 power to the left side of the heater in the wiring diagram so the timer motor has L1 voltage on both sides so does not advance.

I am not sure what the problem actually is as you have replaced the parts that would most likely cause this.

You could check the exhaust temperatures on high heat the thermostat should regulate the heat at about 155 degrees F and then shut the heater off. It should come on again at 130 degrees.

When you cleaned it did you clean the blower wheel.
File Attachment(s):
TEDS840.pdf (190kb) downloaded 11 time(s).
THIS FORUM IS DEAD!!!!!!!
ViperMI  
#3 Posted : Saturday, October 19, 2013 5:40:12 AM(UTC)
ViperMI

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Originally Posted by: denman Go to Quoted Post
Here are your parts
Parts for Estate TEDS840PQ0 Dryer - AppliancePartsPros.com

See the attachment for the wiring diagram.

The unit use what could be called a poor mans auto sense.

In timed dry the timer gets power direct from the line (L2 , Timer Switch 0 OR/TM , Timer Motor , Timer contacts BU/BK , L1) so whenever the the timer is not at off it will advance.

In auto mode the timer motor only gets power when the heater is off (L2 , Heater , Timer Switch 0 WB/TM , Timer Motor , Timer contacts BU/BK , L1).
Note that when the heater is on you have L1 power to the left side of the heater in the wiring diagram so the timer motor has L1 voltage on both sides so does not advance.

I am not sure what the problem actually is as you have replaced the parts that would most likely cause this.

You could check the exhaust temperatures on high heat the thermostat should regulate the heat at about 155 degrees F and then shut the heater off. It should come on again at 130 degrees.

When you cleaned it did you clean the blower wheel.


No, I'll check that today. Am I just looking for lint build up on the wheel??
denman  
#4 Posted : Sunday, October 20, 2013 1:42:09 AM(UTC)
denman

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[COLOR="Blue"]Am I just looking for lint build up on the wheel??[/COLOR]
Yes

This may be a difficult problem to diagnose.
The heater seems to be shutting off more than it should so the timer advances too quickly in auto modes.

Is the problem the same in both high and low heat settings?
If yes then perhaps the thermostat's internal heater is on all the time.

Are the clothes just damp when taken out of the washer.
I have seen where poor drying ended up being a washer problem.
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