MBB2256GES Bottom Freezer Not Defrosting - ApplianceBlog.com

***solarsurf*** · #1 October 17th, 2009, 12:14 PM

My Maytag MBB2256GES bottom freezer is not defrosting. How can I determine if the problem is a bad defrost timer or bad heater? Also, where are these parts located?

***Jake*** · #2 October 17th, 2009, 12:27 PM

Here's the defrost timer for your model:
Manufacturer's Number: 67001036

67001036

Its #12 here:

What I do is get a flathead screwdriver and turn it clockwise, there should be a small access hole under it to stick your screwdriver up in it to turn it, if your refrigerator is running when you turn it, turn it slowly till it shuts the refrigerator off, then it will be in defrost.

Give it about 20-30 mintues to see if the defrost heater comes on and defrosts it, if so, then you have a bad defrost timer.

Jake

***solarsurf*** · #3 October 17th, 2009, 01:09 PM

Jake, the drawing does not correspond with my refrigerator. I removed the enclosure on the top of my freezer compartment. I contains only the thermostat assembly, light fixture, light switch and cable/connector. The cable/connector connects to a connector at the top of the freezer compartment.

Can you tell me where the defrost timer is located on this model?

***Jake*** · #4 October 17th, 2009, 01:21 PM

Unless you gave me the wrong model#, then that drawing is what I show as yours:

Jake

***Jake*** · #5 October 17th, 2009, 01:24 PM

Wait, its in the refrigerator section, NOT freezer.

Jake

***solarsurf*** · #6 October 17th, 2009, 03:34 PM

Jake,
I put the freezer compartment back together then disassembled the assembly at the top/front/center of the top (refrigerator) compartment. After looking inside this assembly, I understood that you meant that the small hole access was from below, without the need to disassemble. I put it back together and then did as you suggested and turned the rotor inside the access hole clockwise. The refrigerator stopped running and it seemed that the heater came on. So probably a bad timer.

I expected that the refrigerator would stay off (since I assume that if the timer is bad, it is not spinning), however after about 30 minutes, the refrigerator turned back on. I'm going to wait to see if it frosts up again.

***Jake*** · #7 October 17th, 2009, 03:59 PM

Yes, that can happen, but if the timer has a bad spot in it, it can hang somewhere in the regular cooling cycle, thus not going into the defrost cycle.

Jake

***solarsurf*** · #8 October 20th, 2009, 06:44 PM

Jake, I let it run for a few days. It seems to be defrosting again. That is, it seems like the timer may have been "stuck". Once I advanced it manually, it seems that it is functioning again. I'm going to keep an eye on it ... I'm sure I'll revisit this problem again. Thanks for your help!

***Jake*** · #9 October 20th, 2009, 08:30 PM

Ok solarsurf, sounds good.

Jake

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The Following User Says Thank You to Jake For This Useful Post:
*solarsurf* (October 20th, 2009)

The Following 2 Users Say Thank You to Jake For This Useful Post:
*solarsurf* (October 20th, 2009)