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Forum Index => Dryer Repair => Topic started by: richard dicarlo on January 16, 2013, 10:22:46 AM

Title: Two dryers that used to work now do not
Post by: richard dicarlo on January 16, 2013, 10:22:46 AM
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.
Title: Re: Two dryers that used to work now do not
Post by: Bailey on January 16, 2013, 11:27:13 AM
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.
Title: Re: Two dryers that used to work now do not
Post by: richard dicarlo on January 16, 2013, 12:18:33 PM
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.
Title: Re: Two dryers that used to work now do not
Post by: richard dicarlo on January 16, 2013, 12:20:44 PM
How do I  check if the motor(s) are good?
Title: Re: Two dryers that used to work now do not
Post by: richard dicarlo on January 16, 2013, 04:50:19 PM
motor shows 120v between blue 28 and ground.
Title: Re: Two dryers that used to work now do not
Post by: AJ on January 16, 2013, 05:42:39 PM
motor shows 120v between blue 28 and ground.

On what dryer?
Title: Re: Two dryers that used to work now do not
Post by: richard dicarlo on January 16, 2013, 07:15:16 PM
maytag
Title: Re: Two dryers that used to work now do not
Post by: AJ on January 16, 2013, 07:33:05 PM
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 (http://click.linksynergy.com/fs-bin/click?id=omv7WULuxaw&subid=0&offerid=225193.1&type=10&tmpid=2111&RD_PARM0=http%253A%252F%252Fwww.appliancepartspros.com%252Fwhirlpool-fuse-thermal-33001762-ap4043259.html&RD_PARM1=http&RD_PARM2=%253A%252F%252Fwww.appliancepartspros&RD_PARM3=.com%252Fwhirlpool-fuse-thermal-33001762-ap4043259.html).

Here is a video that will show you how to check the thermal fuse.
Thermal Fuse Help Video (http://www.repairclinic.com/PartDetail/Thermal-Fuse/33001762/516650#repairHelpVideoTabs)

Let us know what you find or if you have any other questions.
Title: Re: Two dryers that used to work now do not
Post by: richard dicarlo on January 16, 2013, 08:54:42 PM
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.
Title: Re: Two dryers that used to work now do not
Post by: AJ on January 16, 2013, 09:06:46 PM
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.
Title: Re: Two dryers that used to work now do not
Post by: theoldstoveguy on January 16, 2013, 10:32:56 PM
Do you have continuity between Grey 51 and Red 31 with wires off and no power?
Title: Re: Two dryers that used to work now do not
Post by: richard dicarlo on January 17, 2013, 08:18:09 AM
grey51-red31 shows connectivity with the power plugged in but no connectivity with the power unplugged.
Title: Re: Two dryers that used to work now do not
Post by: theoldstoveguy on January 17, 2013, 08:27:02 AM
On the motor switch with no power and wires off? That is the motor overload protector. If it is no continuity, bad motor.
Title: Re: Two dryers that used to work now do not
Post by: richard dicarlo on January 17, 2013, 11:05:16 AM
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?
Title: Re: Two dryers that used to work now do not
Post by: theoldstoveguy on January 17, 2013, 05:42:48 PM
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) 
Title: Re: Two dryers that used to work now do not
Post by: JWWebster on January 17, 2013, 06:30:41 PM
I always check various components with power disconnected and remove wires from each component to prevent a GHOST feed.
Title: Re: Two dryers that used to work now do not
Post by: richard dicarlo on January 17, 2013, 06:40:49 PM
removed the wire harness from motor and checked for continuity between the posts 5(red 31) and 4(grey 51) on the motor shows no connection.  Does this mean dead motor?
Title: Re: Two dryers that used to work now do not
Post by: theoldstoveguy on January 17, 2013, 06:49:50 PM
Yes bad motor.
Title: Re: Two dryers that used to work now do not
Post by: richard dicarlo on January 17, 2013, 06:52:19 PM
 :( that's what I was afraid of.
Thank you to everyone that helped.  :thanks:
Now I have to find out what is wrong with the other dryer, hopefully not the same thing.
Title: Re: Two dryers that used to work now do not
Post by: theoldstoveguy on January 17, 2013, 07:17:28 PM
Y302278 (http://click.linksynergy.com/fs-bin/click?id=omv7WULuxaw&subid=0&offerid=225193.1&type=10&tmpid=2111&RD_PARM0=http%253A%252F%252Fwww.appliancepartspros.com%252Fwhirlpool-motor-y302278-ap4290642.html&RD_PARM1=http&RD_PARM2=%253A%252F%252Fwww.appliancepartspros&RD_PARM3=.com%252Fwhirlpool-motor-y302278-ap4290642.html) is part number for the motor.