Sub-Zero 650 / O Bottom Freezer Refrigerator Logo
J
Joseph Posted on Mar 19, 2014

I have a mabe fridge top freeze! Lately it has being freezing to a point of building scorch and plugging the vent conduicts to the bottom!

1 Answer

Jerry Mullins

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  • Contributor 50 Answers
  • Posted on Mar 24, 2014
Jerry Mullins
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Joined: Mar 17, 2013
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Sounds like your defrost heater is not working, there is a timer that turns on a electric coil to defrost your coils, either the timer is out or the coil is bad. take the back cover off the freezer and check the defrost coil it is usually obvious if the defrost coil is bad if its not that it is probably the timer that controls it.

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If the vents at the back of the fridge are covered, the cold air will settle to the bottom of the fridge after it enters, and freeze your vegetables. The problem could be caused by ice build up in the evaporator coil of the freezer section also, but this will probably warrant a checkup from a pro.

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