Question about Maytag MBB2256GES Bottom Freezer Refrigerator

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Frozen evap coil

Where is the defrost timer motor located on a maytag bottom freezer - model mbb2256ges.

thanks for your help

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  • 23 Answers

In the upper food section in the middle of the light/temp control panel.

Posted on Jul 28, 2010

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Maytag fridge has not been staying as cold as should. In last day freezer is starting to leak water and food not staying frozen. Have turned up controls to coldest.


I would guess that the evap. coil in the freezer section is ice up, could be a bad defrost timer or just a heavy accumalation of ice, turn it off and let it thaw, or locate the defrost timer and advance it to a defrost, the timer is usally in front just behind the bottom vent cover.

Jun 26, 2011 | Refrigerators

1 Answer

How do I replace a defrost thermostat on a Maytag MBB2256GES?


Good day,
You have to remove the rear panel in the freezer compartment. The thermostat is clipped to the top of the cooling coil. Fairly simple job.
Here is a picture of one style..


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May 20, 2010 | Maytag MBB2256GES Bottom Freezer...

1 Answer

Refrigerator keeps running


Good day,
Timer is O.K. It's doing what it should be doing. Likely the defrost thermostat mounted on the top of the cooling coil has failed. I't's a round 1" disk clipped to the top of the coil, with 2 wires coming out of it.
Remove rear panel in freezer panel to access the tstat. Could be the main calrod heater as well, but it rarely fails.

Mar 11, 2010 | Maytag MBB2256GES Bottom Freezer...

1 Answer

Defroster timer location


Good day,
Sorry, no timer. This machine is run by a motherboard which gets it's data from a series of thermistors.
The motherboard is located on the back rear of the machine behind a removable cover.
In the freezer, behind the rear panel, is a main heater located at the bottom of the evap coil.
As well there is a limiter thermostat located on the top of that coil. Either can go bad. To test you need an ohm meter and a decent knowledge of electrical.
2 thermistors are located in the same area. One helps decide when to defrost, and the other is used to control fan motor speed. (simplified).
If you feel comfortable digging that deep, you can start testing, and/or removing suspected parts and taking them to an appliance parts house for testing. The motherboard is very pricey.

Look here if you want to see a breakdown of the machine..
Copy model number first.

http://www.appliancepartspros.com

Nov 27, 2009 | Hotpoint HSM25GFRSA

2 Answers

How do u access the defrost heater of the maytag mbb2256ges bottom freezer? from the rear of the fridge or remove the inner freezer panel?


Good day,
You access it from the front removing the rear panel in the freezer compartment.

Note: the heater may have failed, but has a very low failure rate.
If the machine is not defrosting, the timer and defrost thermostat ( sometimes called a limiter) are just as if not more often the problem.


Nov 04, 2009 | Maytag MBB2256GES Bottom Freezer...

1 Answer

Maytag refrigerator, feezer side coil frozen and frigirator not


Defrost circuit failed, needs to be able to defrost the coils so air can pass through them thus cooling evenly. You can check the heaters located on the coils probably near the bottom back wall of the freezer with a ohm meter if you read through, the heaters are good, if you get no reading the heaters are bad. Or could be defrost timer or on newer models the adaptive defrost control which is a circuit board. If its an older model you can manually turn the timer with a screwdriver if you feel resistance, then you should replace the timer. Also in the circuit is the defrost thermostat located on the coils, this is the least expensive of the 3 components to replace. You should have a schematic located under the fridge, use this to determine which type of timer you have and for further trouble-shooting. Please let me know if this helps

Aug 22, 2009 | Maytag MCD2257HE Side by Side Refrigerator

1 Answer

Defrost Timer?


depending on model thats either your timer or cold control would be about 200

Mar 19, 2009 | Maytag MBB2256GES Bottom Freezer...

1 Answer

Refrig & freezer not cold enough; ice forming; low air volume


If ice/frost is building up on the back wall of the freezer then you have a defrost system failure.

Defrost system; Evap Fan, Heater, Thermo disk, Timer.

Evap Fan - this should be running all the time except when it goes into defrost mode.

Defrost Timer - This part is hard to locate on some models, a call to a parts place with the model number can help you find it and tell you if this is the type you can mannualy turn to put in the defrost mode. If you can do this, take the back panel off in the freezer so you can see the cooling coils. The heater should be red hot and melting the ice. If so, replace the timer. If not, you need an OHM meter to check the heater and therma disk.

Un plug the Ref, locate the heater, usually looks like a heating element in an oven and runs across the bottom of the coils. Touch the meter leads to each end of the heater. If no reading, replace.

Therma Disk - located close to where the coils enter the freezer, small round disk clipped to the coils. Check the same as the heater but, you won't get a good reading unless the temp is below freezing. Any doubt, just replace, it's not that expensive.

This is a lot to do, hope this helps.

Jan 23, 2009 | Refrigerators

1 Answer

Kenmore fridge bottom freezer. Freezer is cold but fridge is warm


Sounds like the start of a defrost problem, open your freezer and see if the back wall has any frost on it. if so your evap coil is in-packed with ice and it won't be long till you start to lose cooling in the freezer also. If you don't have ice on the back wall check the evap fan motor to hear if it's running ( you should hear it when u open the freezer door or feel the air movement.) note: if the evap fan motor is not running that may also cause frost build up on the back wall of the freezer. If the fan is not running remove the back wall and check the fan wires for 120 volts ac.if you have power replace the motor. Also with the back wall removed you can check the defrost t-stat and defrost element you should read a closed circuit on the heater and with the evap coil frozen you will also read a closed circuit on the t-stat to. If the defrost element or t-stat check bad replace that part, if they check good replace the defrost timer. you can hit the coil with a hair dryer to thaw it out till you get the part you need, that will buy you about 3 days. Good luck hope this helps you

Jan 09, 2009 | Refrigerators

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