Question about Roper RES7646KQ Electric Dryer

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Dryer won't start

When I turn the timer to the auto sense dry setting, it will not start when I push the button to start it. If it's in the cool down mode, it will start sometimes immediately and sometimes after I leave it alone for a few minutes. But, if I turn it to the heat mode, it will not work. And the timer continues to count down the whole time. Please help! I really can't afford a new dryer right now.

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The timer mechanism is faulty. replace it asap.

Posted on Jul 23, 2009

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Posted on Jan 02, 2017

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1 Answer

Kenmore dryer 110.86864100 - Where is the moisture sensor?


Ain't no moisture sensor. This is is not an electronic sensing machine. It uses another method to determine dryness. An orange wire connects to the base of the heating element. The timer motor is driven by power from it in auto dry. The timer motor is VERY slow. Slower than most dryer timer motors.As the clothes get dryer the heat is not needed so the element is turned off by the control thermostat which is mounted next to the skinny white fuse on the blower housing. This allows for the turtle like motor on the timer to advance. Once the clothes get to the point of dryness the heater stays off way longer and the timer motor advances on over to the cool down and carry on over to the end of cycle. So the clothes won't always be dry due to factors like lint buildup in the blower housing, venting to outside and so forth. having said that my mom bought a brand new Kenmore dryer and I set it on 55 minutes timed drying. At the end of that them clothes is still damp. I then set it to auto dry high heat and that usually gets em dry. I think the main probo with this dryer is the thermostat ain't set as high as older models to keep the heat at a moderate temp so that the limits won't blow on models in apts and such. Just a theory.

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Whirlpool gas dryer (WGD9450WR1) not drying on auto-cycles


try cleaning the 2 silver senser bars located inside the dryer drum on the door side with isopropyl alcohol and lint free wipes,these bars sense moisture and control timer speed,and when they get coated with the chemicals in dryer sheets they become coated and can no longer sense the damp clothes (these sensers use capacitance to sense moisture)

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I have an electric Estate Dryer made by Whirlpool TEDS840PQO. It has "Timed Dry", "No Heat Fluff" and "Auto Sense Drying" settings. On the Auto Sense Drying it has...


Verify that the wrinkle prevent switch is good. If so, the timer is likely the problem. Sometimes the switch contacts inside the timer can be cleaned to restore operation, bit it is a tricky item to disassemble and reassemble.

Mar 07, 2017 | Dryers

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Takes 4 ever to dry clothes. Will run & run when on auto dry.


If your dryer seems to run forever, it could be because of a clogged vent or internal ductwork. Your dryer may have an automatic cycle that turns off the dryer when the clothes are dry. It does this with a special thermostat or moisture-sensing system.Normally, this is what happens during an automatic cycle: The thermostat tells the dryer to heat until the interior of the dryer reaches a pre-set temperature--say 135 degrees. When the dryer reaches the pre-set temperature, the thermostat tells the timer to begin advancing. (If there's a moisture sensor, the timer advances only if the moisture content of the clothing is low enough.) The timer advances until the interior cools, then the thermostat tells the timer to stop advancing, and tells the dryer to start heating again. This cycle continues until the clothes are dry. But...if the vent is clogged, the dryer may never reach the proper operating temperature, so it doesn't send the signal to the timer and the dryer continues to run indefinitely, even if the clothes are completely dry. To fix the problem, clean the vent and/or internal ductwork.

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1 Answer

I have a 5 year old Whirlpool Electric Dryer, Model #LER7648KT2. The Dryer won't start. I have checked the door switch, start button switch and visible thermo switches or thermostats with an ohm meter...


There are usually 2 thermal fuses in dryer circuits. One is on the heater housing and will blow in an overtemp condition around 310-350F.
The other is on the blower or exhaust housing and will blow around 200F
Make absolutely sure the 2nd one is continuous and not intermittently functional. This will definitely stop the motor from functioning

Below is a diagram for an older model (LER4634). Your dryer has some additional terminals probably because it has additional drying cycle options.

The diagram may be more readable when copied and pasted into a plain text editor such as Notepad or another editor with non-proportional fonts

Switch Terminals
|TM |TM |BK |BK |BK |
|WB |OR |BU |BU |R |
|-- |-- |V |-- |-- |
|---|---|---|---|---|
|O |X |O |X |X |Auto - High Heat
|O |X |X |X |X |Auto - Low Heat
|---|---|---|---|---|
|<> |<> |~ |X |O |Cool Down / Fluff
|O |X |O |O |O |End of Cycle
|---|---|---|---|---|
|X |O |O |X |X |Timed - High Heat
|X |O |X |X |X |Timed - Low Heat
|---|---|---|---|---|

Legend:
O = Open (Infinite Resistance)
X = Closed (Continuous)
<> = Either (But not Both)
~ = Doesn't Matter
NA = Not Applicable

Switch Terminals:

TM - Timer Motor (Different Models may use different colors)
WB - Black/White
OR - Orange
BK - Black
BU - Blue
V - Violet/Purple
R - Red

Example: For the Auto - High Heat Dry cycle, the following terminals are continuous:
Terminals
<TM - OR>
<BK - BU>
<BK - R>
(of course since BK-BU is continuous and BK-R is continuous, then BU-R is also continuous.

This should allow you to test at least some of the cycles your timer switch has

I have a general schematic in PDF for whirlpool for gas and electric, but did not see an option to add an attachment to this message.

Hope this helps or point you in the right direction.

Apr 21, 2009 | Dryers

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