Question about Maytag Neptune MDE5500AY Electric Dryer

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How do you know if thermal fuses & high limit thermostat are bad

Motor keeps kicking out replaced with different motor still kicks out. I currently have drum out so there is no load on the dryer motor.

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Have to have a meter with continuity feature. Remove fuses and connect meter leads to each side of fuse then turn on meter to continuity setting and if it beeps then it is good if not then it is bad.

I am not a professsional appliance repair person but have fixed my own all my life.

Hope this helps
TankMurdock

Posted on Apr 23, 2009

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LG TROMM DLE 3733W dryer Sometimes it won't heat and try the clothes and sometimes it will. I hear the high temp switch kick off when it doesn't work.


You might have excessive lint build up in the air flow inlet. Then excessive heat trips the thermostat limit switch. The thermostat limit switch could be defective too.

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Electric dryer spins no heat, replaced heater element and high limit thermostat, tested thermal fuse and it does have 0 ohms, thermistor reads ~50 ohms.


in addation to checking the high limit t-stat have you checked the thermal cut off (the small t-stat) on the heater housing where the element fits into, the high limit t-stat and the thermal cut off BOTH shoud have 0 ohms (the thermal fuse is in the blower housing) the cut off is on the heater box, if you have checked those to be good, check that the heat relay on the control board is closing and sending power to the element, if not replace the control, if all above are good then the motor switch is bad and not sending power to the element(thats a built in safety feature so the dry would never heat when the motor isnt running)the element of course heats only when 240 volts ac is to the element ,120vac from the relay on control through the high limit t-stat then through the thermal cut off finally to the element and 120vac from the motor switch for a comined 240 vac

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Roper electric dryer will not heat after replacing heating element and thermal fuse. what's wrong.


It doesn't necessarily mean the heating element is busted when the dryer stops heating and the thermal fuse is not part of the heating circuit, it is part of the motor circuit. The heating circuit is basically composed of the heating element, thermal cut-off, high-limit thermostat, cycling thermostat, and the motor centrifugal switch. The most common part that causes the dryer not to heat is the thermal cut-off and/or the high-limit thermostat. Verify this condition by bypassing the said components. Click on the link below for the detailed instructions. Indicate the exact model number of the dryer should you need further assistance.

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The motor on our 6qt 69206 White Mountain Ice Cream freezer is not quite 3 years old. It kicks off . It won't pull a load. Kicks off without being hot.


Need to have an appliance tech look at it. Some motors have a current limit/thermal cutout inside. Does it cut off without being attached to bucket? Is motor gearbox bound up somehow? If motor is removed from gearbox and turns, then gearbox needs some lube or is otherwise defective/seized.

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Furnace will kick on, begin heat up, go to the point where the fan should start and the whole thing shut down. If I move the thermostat down below the temp it show, it will start again and do the same...


Hi,

Sounds like the blower motor is bad and then the unit is kicking off on high limit....

Probably nothing you can do with out getting a new motor to replace the bad one...

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1 Answer

The high limit thermal switch on heater burns out.


There are two thermostats, a 'limit' or 'operating' thermostat which turns the heating element on and off, and a 'high limit' or 'safety' thermostat which oversees the 'operating' thermostat by opening and removing power to the heating element when the upper limit temperature is reached. Basically, the only difference between these two are the temperature ratings. The 'high limit' is higher than the 'operating' thermostat. The thermal fuse is the last resort protection.

First and foremost, you must know that every inch of your exhaust vent pipe is clean.

Usually, a bimetallic limit switch will degenerate in the direction of too low of a temperature range because as the parts wear out inside, the mechanical tolerance widens (the tiny rod that pushes the contacts together gets shorter).

The high limit thermostat is by the thermal fuse. The operating thermostat is in the blower housing.

Check the fan impeller for broken vanes and lint. The impeller is directly coupled to the motor and should not turn without the motor. The fan housing and ducting should be free of excess lint.

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The dryer doesn't start when turned on. Has been working fine for 4 yrs from new. It ran yesterday but didn't dry - and wont start today. The electrics still "work" - they "tick over" when turned on...but...


The problem you describe is usually caused by a thermal fuse intended to shut the dryer motor down and keep it off because of a problem with air flow within the dryer.

The following process will allow you to test the thermal fuse and replace it if you find it open.

Unplug unit and turn off gas if gas model. Check to be sure you have 240 Volts at wall outlet.

Most parts likely to fail on electric dryers are inside the rear cover. Heater is on right inside can, safety thermostat on lower left of can, High limit thermostat (non-resettable) higher left of can. On the blower housing to the left are the operating thermostat and, in some models, a thermal fuse (white plastic). ALL can be continuity checked easily. Always disconnect wire on one side of what you are testing. One will likely be open. Replace the component that fails the continuity test.

The thermal fuse or high limit thermostat failure generally points to a reduction of air flow due to SOME blockage either inside the dryer or in the vent pipe leading out of the house. If you find either of these parts bad be sure to check the vents after replacing parts to ensure the same parts won't fail again.

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Maytag neptune dryer mde5500ayq replaced old motor with new motor starts up first time alright I turn off and it will hesitate to restart. most times it will not restart. Humms then kicks out. I have no...


Compare the wiring connections on both motors. They may be marked. They may be different. Careful examination will determine the start and run wires. Other wires turn on the heat once the motor reaches running speed. The thermal fuse for the motor is internal and unservicable. The hi limit sensor will control the heat, but will not necessarily turn off the motor.

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pry the top up at the corners and remove attaching screws for the front panel and remove carefully. Now you should be able to see the canister that contains the heat element and the thermal fuse. If your thermal fuse is bad you also need to replace the high limit thermostat switch which is located on the canister itself and check that the heating element is not broken anywhere throughout the coil.

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Maytag Neptune dryer overheating


Hello
Welcome to Fixya
My name is Huum,

Yes, I agree it is the high limit thermostat, or the motor is bad!



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Feb 03, 2009 | Maytag Neptune MDE5500AY Electric Dryer

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