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Maytag Plus Refrigarotor have Ice Build up. Have replaced Defroster Timer but still have same problem.

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  • Santi Panya Aug 28, 2010

    Maytag Plus MDZ2752GR Refrigarator have ice build up have to blow out ice every 2 weeks. Have replaced Defroster Timer but still have same probles.



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Hi, not knowing the age and model details, I can say that you have replaced the defrost timer and this did not solve your problem. Now you will need to locate the defrost thermostat control. This is a single pole stat either with a normally open or closed set of contacts in it which works together with the timer or alone depending on the conditions. If this stat reads a temperature of lets say 23* F and the defrost timer is past its time to defrost, this thermostat will close or open its contacts to either bring on heat strips or use hot gas defrost, what ever the factory has made it to do. So, if this stat fails,all will ice up. It is normally located in the freezer compartment and is small and round with a single wire going into and back out of it, so will look as though it has 2 wires in the top of it sealed in a wax type material. It may have 2 of these stats. The way to check the stat is to cut back about 6" of the wires and it just snaps on the suction line of the evaporator coil. Take a look at the numbers on it as it will say if it is n/o or n/c contact.If you have a meter, you can check the continuity of it to see if it is opened or closed by the temperature stamped on it. If it is supposed to close for example at 25*f and you have it out in 75degree temp., it should read no continuity until it reaches its set point. This would mean it was good. If it read continuity, it would be faulty. It will have the factory readings stamped on the body of it and contact N/C or N/O so you will no by the temperature when you test it which way this contact should be in. This is a very simple way of checking these type of defrost thermostats. Make sure your evaporator fan in freezer is running up to speed also. If you still have the schematic on the box, it will show you where they are and if N/O, or N/C. Please keep me posted on this and get back to me to let me know how it came out for you. Please be kind when rating me as I know you will. I am glad to be of help to you also, and will be here in the near future at anytime for you on any problems.
A/c, Heating, & Refrigeration Contractor

Posted on Aug 28, 2010


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Model No IK 458 -4-4T; Product No 925 780 652 02 Ser No 14100010. I get ice build-up on floor of fast freezer comp which jams pull-out basket.

If the defroster coil is not working, then ice will build up on the coils inside the back of the refrigerator.

But, you're saying that it's accumulating on the floor of the freezer jamming the pull out basket.

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There is a problem with the defroster circuit. You already mentioned the timer was replaced. You need to consult your manual for a diagram ( or search at to see where the defroster thermostat, thermal fuse, and defroster heater itself are located at, or where the wiring is run.

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Make sure defroster heater, temperature switch, and defroster timer and/or circuits are working.

Ice buildup will stop airflow from freezer to fridge, so fridge will be too warm.

My guess would be that the defroster is working half the time, allowing ice to build up. When it does work, it's got way too much ice/water to deal with, so it overflows the pan underneath.

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Hi, Here is a picture of the control panel where the timer is located. There is a1/4" screw holding the control panel up. Remove the screw and the control panel should release. The timer has a wire harness of 4 wires. It can only plug in 1 way.
Please let me know if this has helpes you at all or if I can assist you further.


Jul 26, 2009 | Refrigerators

1 Answer


if you are having ice build up in the freezer, the problem is likely to be the defrost timer. That timer turns on heating elements and melts the ice and the melt runs downd into a tray under the bottom of the cabinette where heat from the condensor evaporates it into the air. Look and see if there is any information in your manual or online Maytag books or service information as to where the timer is located. Most can be turned by hand and that may let you change it to defrost mode until the ice is gone and prove that it is the timer that is bad.
Good luck,

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Refrigerator on the fritz

The defroster is not working. Ice build up prevents cold air from the freezer chest from blowing into the lower part.

The way the defroster works is this: There is a defrost timer, probably found under the refrigerator at the front, that turns on the defroster three times per day or so. That turns on a heater nested among the freezer coils. It keeps heating until the defrost thermostat gets warm; then it quits defrosting.

I think your defrost timer doesn't turn. You can turn it with a screw driver till you hear a click. Now your ice compartment should be defrosting. With ice buildup it may need lots and lots of defrosting. You might not get cooling back into the lower part for awhile, till the ice buildup melts.

By the preceding, you should know if the defrost timer needs replacing.

If you should need to manually defrost the freezer coils, they are, I think, under the floor of the freezer. To defrost them, I'm told, a hair drier works better than boiling water. The defrost thermostat is in there too, a one inch unit with two wires. It should have no continuity warm, closed circuit frozen. If it has open circuit frozen, that would be your problem.

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