Two dryers that used to work now do not

[richard dicarlo]

I have a Maytag Neptune MDE3000 and a frigidaire fde7976fs0 dryers that will not start. Both worked recently but have stopped. On both dryers I have checked the following: start switch, door switch and the thermal fuses, all show to be working properly. No sound from either when the start button is pressed.

[Bailey]

I always start by checking voltage at the outlet and check the cord where it attaches to the dryer. This is where the wiring diagram comes in handy. You will need to follow the circuit to the motor, checking for voltage or continuity through each component. Sounds like you have done the right things so far.

[richard dicarlo]

I have checked the voltage on both at the terminal box, shows 220v. Do I need to check for voltage or continuity from the box to the motor?

Thanks for the help.

[richard dicarlo]

How do I  check if the motor(s) are good?

[richard dicarlo]

motor shows 120v between blue 28 and ground.

[AJ]

motor shows 120v between blue 28 and ground.

On what dryer?

[richard dicarlo]

maytag

[AJ]

maytag

You should have power to the gray and red wires on the motor wire harness.

Most of the time if you have the correct voltage to a dryer and the motor does not run it's because of a bad thermal fuse or door switch.
Many times if the motor is bad it will still growl, hum or start hard, but you can tell it's getting voltage.

You can check the door switch and thermal fuse for continuity with a multimeter to see if they are good or not.

The MDE3000 uses thermal fuse part # 33001762.

Here is a video that will show you how to check the thermal fuse.
Thermal Fuse Help Video

Let us know what you find or if you have any other questions.

[richard dicarlo]

I've checked both thermal fuses and the door switch, they all show connectivity. No sound, nothing happens on either dryer when the start button is pressed.
voltages:
Color-Number(Position on harness)
Grey-51(4) to Red-31(5) voltage = 0 with the door open and closed or start button
Red31(5) to Blue28(2) voltage = 121V door open and closed or start button
Yellow35(6) to Blue28(2) voltage = 65V door open, 124v door closed
blue28(2) to black32/33(1) voltage  = 124v door open or closed.

[AJ]

I have attached the wiring diagram I'm looking at for your Maytag MDE3000.

Would like to see what some other techs think of your voltage readings.

[theoldstoveguy]

Do you have continuity between Grey 51 and Red 31 with wires off and no power?

[richard dicarlo]

grey51-red31 shows connectivity with the power plugged in but no connectivity with the power unplugged.

[theoldstoveguy]

On the motor switch with no power and wires off? That is the motor overload protector. If it is no continuity, bad motor.

[richard dicarlo]

first thanks for the help.
not exactly sure how to check the motor switch. I was suspecting the motor. 


second if that is the problem with both what would cause it?

[theoldstoveguy]

On the motor look for the wires ( from the back of the machine) remove both wires and put meter on continuity (ohms) check between the grey and red on the switch, should read as a closed circuit. Is the meter you are using digital? If so put on 200k ohms and you should get 000 across the meter. (closed circuit no resistance)