Maytag MAH3000AWW has intermittant fill problem.

[jensenkr]

Hi, I read every post I could find on the MAH series washer. You guys have given out a lot of good advice! I've spent my entire adult life working as a consumer electronics technician. Never employed as an appliance technician but have fixed my share of friends and families units over the last 40 years.
My problem is very intermittent but is starting to get worse. In a nutshell, the washer would stop occasionally by itself at the start of the #2 rinse cycle. Now its got to the point that it can stop just about anywhere. I noticed that it did not appear to be filling sometimes. During one failure, I was able to meter the voltage on the Control Board outputs that drive the cold and hot valves. I found neither had the required 120vac. Also during one failure the cold valve would not open but the hot would. It also sputtered one of the water valves on and off about 3 fast times on one occasion.
I checked both section of the pressure switch and they appear to be OK as well as the 3 series balance switches. I'm guessing that the control board is the only thing that can cause one or both water valves not to open. There is no sign of heat or water on the control board, but I haven't had the cabinet open far enough to see the motor control board.
Before I buy a new control board I wanted your valued opinion. Also, I'm painfully aware that it is 10 years old, but it has had an easy life of about 3 or 4 loads a week. It has also had several mods made while it was under warranty. But I do plan to check the color of the wax motor before ordering the board.
Thanks in advance,
Kevin

Model MAH3000AWW

[whirlpooltech]

but I haven't had the cabinet open far enough to see the motor control board.
Before I buy a new control board I wanted your valued opinion.

Take a close look at the motor control board for damage. Also let us know what color wax motor you have in it.

[jensenkr]

Thanks for the FAST response!
I'll get into it in a few days and let you know what I find!

[whirlpooltech]

It sure sounds like a problem with the control board or a bad connection, but it's easy enough to look at the motor control board before you order the other board.

[Repair-man]

Remember that the Neptune must fill adequately within 6-12 minutes. If the cold water is barely trickling in, it will cause a prolonged fill and the machine control will shut down the cycle.

Also, if the wax motor does not energize the spin-enable switch at the far end of the door latch, the machine control will also shut down. There are 2 more wax motors inside the dispenser which will also fail, so replace them all if they have red shafts.

Regarding the old motor control you have on this early model, there will be marked brown spots on the resistor board at the top of the control which indicates overheating. The new style motor control conversion kit will be your best bet in this case  12002039.


Part # 12002039 Motor - Drve, AP4010145

[jensenkr]

Hey,
I finally got the time to get back in to this.
The Motor Control Board looked clean!
So I changed out the main CPU Board and it fixed the problem. (I think the CPU Chip is bad!)
I also upgraded the door wax motor.
Everything seems to be working fine now.

Thanks for the tips!
Kevin

[whirlpooltech]

Hey jensenkr,

That's great! Glad to hear you got it repaired.

Thanks for the update.