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Repairman1981
Repairman1981, Home Appliance Technician
Category: Appliance
Satisfied Customers: 4548
Experience:  7 years Repairing Appliances, Factory Trained in Several Major Brands
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My Maytag Neptune MDE5500 dryer wont heat. I have tested

Resolved Question:

My Maytag Neptune MDE5500 dryer won't heat. I have tested the coils, theromstats and replaced the thermistor. Still not working. I just checked the voltage across the coils and it is only 120v from the bblack side. No power from the purple line leading to the heater relay. Any thoughts on what is wrong?
Submitted: 3 years ago.
Category: Appliance
Expert:  Repairman1981 replied 3 years ago.

Repairman1981 :

So the side wired to the wall has 120 and the side from the heater relay on the board shows nothing?

Repairman1981 :

This is unhooked I assume

Repairman1981 :

You have checked resistance of the heater, replaced the thermistor and cycling thermostats correct

Repairman1981 :

Have you by chance checked power into the machine to verify you have a good 220v across l1 and l2?

Repairman1981 :

always start there on a dryer that tumbles but doesn't heat

Customer :

Yes, I have checked the continuity of the entire circuit and have 220v across 1 & 2.

Repairman1981 :

Then you have a bad relay/ board

Customer :

However, I have only 120V at the heating coil to ground.

Repairman1981 :

have you unhooked the wires and tested?

Repairman1981 :

You could have 120v from either one

Repairman1981 :

This model pulls 120v from motor centrifugal switch and board

Repairman1981 :

Making 240

Repairman1981 :

If you test hooked up you don't know which isn't working

Repairman1981 :

Either you have a bad motor or a bad board

Repairman1981 :

have you checked either for a burn mark?

Customer :

I didn't see any burn marks from the front, but haven't pulled off the back to get a better look at the motor.

Repairman1981 :

The thermistor will normally keep the board from closing, but if you have replace that then ...

Repairman1981 :

The motor usually won't "look" burned unless you had a fire

Repairman1981 :

but if I remember correctly (don't have the tech sheet pulled up) the purple wire is off the motor centrifugal switch

Repairman1981 :

If you don't have 120 to ground on it with it unhooked bad motor

Repairman1981 :

you know the motor has power since it's spinning

Customer :

Yes, it is spinning and the side coming from the motor has the 120V. It is the line coming from the board/relay that doesn't

Customer :

have any voltage.

Customer :

(to ground).

Repairman1981 :

then you have a bad board .... that is all it can be

Repairman1981 :

I wouldn't suggest trying to do board level repair for liability reasons, but that is really all it can be

Repairman1981 :

Probably just the relay but I would suggest buying the board

Repairman1981 :

If you know how to replace the relay go for it, but I can only guide you like the manufacturer would have it repaired with factory service

Customer :

Can I bypass the board (by short the wires going into the relay)?

Repairman1981 :

if the relay is open (meaning 2 wires going to it directly) yes

Repairman1981 :

I can only see the wires on the diagram, but if the relay has both plugged in the top yes

Repairman1981 :

Most of their dryers get power from the board then send it out to the heater (no way to short obviously)

Repairman1981 :

You cannot do this long term will overheat

Repairman1981 :

Just to test though you will confirm the board is bad by doing so

Customer :

Yes, their are two wires going into the relay. I only wanted to bypass to test to ensure th board is bad.

Repairman1981 :

But power comes in to the motor out the switch to the heater

Repairman1981 :

Other side power comes in to the relay and out to the heater

Repairman1981 :

So .... if your sure the motor side is working then it will heat like that

Repairman1981 :

If you like though it's safe to bypass you would be testing your full circuit

Repairman1981 :

Could have a broken wire somewhere I gues

Repairman1981 :

If you wanna send me your full model number I can look up the board for you and get you a price

Customer :

OK, I'll give it a try. I suspect the board/relay. The full model # XXXXX XXXXX

Repairman1981 :

Do you see a seperate heater relay on your model"/

Repairman1981 :

?

Repairman1981 :

It looks like the heater relay is seperate from the board

Repairman1981 :

usually maytag builds them in ... will save you a good bit if not

Customer :

Can you wait just a minute while I check if it comes off?

Repairman1981 :

sure

Repairman1981 :

it will be mounted below the board not on it

Repairman1981 :

It won't come off if it's on the board

Repairman1981 :

Lemme send you a pic

Repairman1981 :

# XXXXX says heater relay

Repairman1981 :

\

Full Size Image

Repairman1981 :

still there?

Customer :

Well, it was actually soldered on the board? It may have been a weak solder joint, because it pulled off pretty easilly!

Repairman1981 :

then it was bad

Repairman1981 :

You should replace the board

Customer :

Anyway, I shorted the two wires going into the relay and started it up and got a good glow on the coils.

Customer :

Yes, the board needs to be replaced.

Repairman1981 :

If you can please look on the machine and send me the full model number

Customer :

Thanks for helping me confirm.

Repairman1981 :

the ayw at the end showed a seperate relay

Repairman1981 :

I would like to be sure i provide the right board for you

Customer :

Full model number is XXXXX

Repairman1981 :

and it's not seperate like in the diagram I sent you/

Repairman1981 :

Well lemme get you the board part number

Repairman1981 :

33003028 is the part number,


You can order from Marcone by calling at 1-888-464-2853. Price is showing as 188.09. If you need anything else please ask by returning to this same question

Repairman1981 :

Don't open a new one

Repairman1981 :

Please remember to click accept and leave feedback

Repairman1981 :

Have a good rest of the weekend and merry christmas

Customer :

Thanks, XXXXX XXXXX Merry Christmas!

Repairman1981, Home Appliance Technician
Category: Appliance
Satisfied Customers: 4548
Experience: 7 years Repairing Appliances, Factory Trained in Several Major Brands
Repairman1981 and 6 other Appliance Specialists are ready to help you

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