Whirlpool 8577891 Thrmst-Fix - AppliancePartsPros.com

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Part Number:	AP3951297
MFG Part Number:	8577891
Made by:	Whirlpool

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Maytag Serial#mu500-4010 Dryer getting warm during cycle, but will not get as hot as it should. Will have to run a load more than normal ranges. Please advise if the element or the fuse would be first place to start?

Trent for Model Number Med6600tq0

Answer Hello Trent, The first thing that you will want to check is venting to make sure that the vent from the blower wheel to the outside of home. If the vent is clogged it will cause an issue where the unit will not be able to exhaust the moisture and will cause longer drying times.

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Recieved the thermal Dryer cut off kit # ap3094244. it looks a little different as it does not have the plug for the two red wire harness that went on the old part, # 8577891.. there was also a new part that I placed on the upper setion ot the heating duct. Pugged it in and nothing happened. When pressing the start button, the sensing light on the panel lights up and nothing else happens. While I was out here on the pc, the dryer signaled it was done, and beeped. It was not runing an must have timed out? Anyway, I found the diagnostic sheet and managed to pull some codes: F-23, F-25 and C-5. Checked the Exhaust Thermister, no resistance, same with the Inlet Thermister. Very strange. Checked the P4-3 and P4-6 terminals and the reading was 13.8k Ohms. This tells me to replace the Machine Control Electronics. What is the next step? Help. Tired of going to the laundrymat. Thanks.

Peter for Model Number WED6200SW0

Answer Hello Peter. If the tech sheet is referring you to replace the control board, then that is what you will need to do with the unit.This is provided to help the technician repair the units.

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My rf code keeps coming on . What does that code mean?

Lenore for Model Number wed6200sw1

Answer Hello Lenore. The error code you provided is for a restricted vent in the unit. Check and make sure the lint filter is clean, and the dryer vent is clear and not clogged or kinked.

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We did a load of drying good, and then tried to restart another load and the power on the board comes on but it will not start? Did a diagositic check and it says code F-25 which says its the "inlet Thermistor"? Can that just go out like that with no other warnings?

Mark for Model Number MED 6600TQ0

Answer Hello Mark. Yes, the thermistor 8577274 can go out at any time. If the code is saying that, you may need to replace the thermistor. You can test the thermistor. It should read around 10,000 ohms at room temperature. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. Hope this helps. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html

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I checked each element terminal to the casing and there is no short. I checked the heater relay between N.O.Black and COM Red and that circuit is open.(The N.O.Black connector shows signs of overheating.) I checked the inlet thermistor at P4 pin 1 and P4 pin 2 and found 48800 ohms. I also found a Service Tech Sheet when I opened the Machine Control Electronics. Under "Heat will not shut off" troubleshooting, it refers to P4 pin 3 and P4 pin 6 at the connector.(disconnected.) My reading is 9k to 10k ohms. It suggest that I replace the machine control electronics with a reading between 5k and 15k ohms. Do You agree?

Ron for Model Number wed6600vw0

Answer Ron, Yes, I agree, all your heater circuit components check OK, Problem would have to be in the control board circuit or components. Good Luck.

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I am blowing thermal fuses, When the dryer runs with the back off I can see the the heater coils glow red, but do not cycle off. I have changed AP3951297 (8577891) THRMST-FIX, but this does not help. I get continuity on main spade terminals and when using a lighter the circuit will open. I have also checked the Dryer thermister, it has about 8.5k to 10k ohms at about 79 Deg. When I put my fingers on the sensor the resistance drops quickly.I have also pulled out the heater element to make sure it is not sagging or grounded.

Ron W. for Model Number wed6600vw0

Answer Ron, You are checking the heat with the vent disconnected ? Did you check each element terminal the the heater casing for a resistance reading, You may have an element shorted to the case. Also check the heater relay on the control board for stuck contacts(closed circuit). Your exhaust thermistor circuit checks in range, now you need to check the inlet thermisor for 50,000 ohms at room temperature(connector P4 pin2 to P4 pin1 the red wires). You should find your issue in one of these areas. Good Luck

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