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Thread: Maytag # MBF2556KEB not cooling . . is it fan or defrost control???

  1. #1
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    Mar 2008
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    Default Maytag # MBF2556KEB not cooling . . is it fan or defrost control???

    Our Maytag MBF2556KEB (2 1/2 yrs.) stop cooling the top frig part last month. Bottom freezer was fine but top just stopped cooling. I've seen in other posts here that talk about a small fan that sends air to the top frig part and fails easily. I've also seen posts that talk about a control board for defrosting that must be replaced. The frost build up in the back of the freezer seems to be common to both failures. The first time it did this I unplugged it, waited for the defrost and water spill, then plugged it back in. Started working fine, lasted for about 3 1/2 weeks then went down again. Any advice would be appreciated, I hate calling repair guys for something that could be fixed by just plugging in a new part.

    Thanks
    Mike

  2. #2
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    Hi Mike,

    What you'll need to do is take out all your food from the freezer, then take off your back panel inside your freezer, then check to see if your fan is turning, its located just above your evaporator coil. Your fan should be running when your refrigerator is running, some models have the fan going through the door switch, so if the fan isn't running push the freezer door switch and see if it starts running.

    Your freezer back panel is #4, your evaporator coil is #12, your fan motor is #18 and fan blade is #21 here:



    Report back what you find.

    Jake
    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
    Jake's Appliance Repair Nov. 2005-present

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  3. #3
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    Mar 2008
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    South Florida
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    Default Thanks for the schema

    Schematic was very helpful. I have removed all doors, panels, ice maker, and air diffusers. The fan looks brand new, no damage. When I started it again the fan started just fine, but with door still off, the top layer of coils, nearest the fan, started to frost over right away. I put the door back on and will check in an hour or so. I saw no little circuit board or defrost control. The fan has a number on it : '10449515' and the serial # for my
    unit is '10201676JG' if that helps ID the parts.
    Do I have to put the ice maker back in? We have no water feed on that side of the kitchen and don't use a lot ice anyway.
    All of the parts looked like the drawings.

  4. #4
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    #5 is your electronic control board, Part#W10165748 that controls the defrost cycle as well:


    Press refrigerator light switch five times in six seconds to initiate defrost cycle. Pressing five more times within six seconds will cancel defrost and go straight into the run mode. Similar operation on both bottom mount and SxS refrigerators. After the defrost terminator/thermostat opens, six minutes of dwell time occurs before the compressor and condenser fan motor will operate. After defrost terminator/thermostat open, 10 minutes of dwell time occurs before the evaporator fan motor will operate.

    Courtesy of www.applianceaid.com

    Jake
    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
    Jake's Appliance Repair Nov. 2005-present

    Look-Up & Order Parts

  5. #5
    Join Date
    Oct 2008
    Location
    Rohnert park, ca
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    1

    Default Same problem

    I now have the same problem, the fridge is always warm, but the freezer works fine. The baffle seems to be working. I traced it down to the control board. I put the fridge in service mode and tried to manually turn on and off the compressor and compressor fan. They were both stuck on all the time. I thought it was a bad relay. But after I unplug the unit and plug it back in, now I can controll it manually just fine. I have read about other bolgs where people have replaced their controll board, and a couple of weeks later it fails again. What should I do?

  6. #6
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    Quote Originally Posted by wgibson View Post
    I now have the same problem, the fridge is always warm, but the freezer works fine. The baffle seems to be working. I traced it down to the control board. I put the fridge in service mode and tried to manually turn on and off the compressor and compressor fan. They were both stuck on all the time. I thought it was a bad relay. But after I unplug the unit and plug it back in, now I can controll it manually just fine. I have read about other bolgs where people have replaced their controll board, and a couple of weeks later it fails again. What should I do?
    Hi,

    Do you have the exact same model# as Mike?

    Jake
    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
    Jake's Appliance Repair Nov. 2005-present

    Look-Up & Order Parts

  7. #7
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    Mar 2011
    Location
    Michigan
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    Default refrig is warm again Maytag PBF2253HEB

    I have had this problem twice before. I have read several blogs and replaced the control panel and a few months later here I am again today the frig is warm again. The coils behind the freezer backwall are frosted over. I hate to replace the control board again at $100 only to have it fail again.

  8. #8
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    Default

    Interesting, well since you already replaced the control board, I doubt it went out again, unless your having power spikes/surges in your house.

    When you open the freezer door do you hear your fan in the freezer running?

    If the defrost heater doesn't come on, you will need to ohm your defrost thermostat for continuity(WHILE ITS STILL FROSTY) should read 0 ohms. Unplug your refrigerator first!

    Here's the defrost thermostat for your model you can order, it clips on the top of your evaporator coil in the freezer:
    Manufacturer's Number: 67003426



    Let us know what you find.

    Jake

    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
    Jake's Appliance Repair Nov. 2005-present

    Look-Up & Order Parts

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