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jclisk  
#1 Posted : Thursday, September 6, 2012 7:44:55 PM(UTC)
jclisk

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The evaporator keeps freezing up. I have replaced the defroster heater unit a couple of times but apparently that is not the problem. What controls the defroster heater unit to keep the evaportor unit defrosted?
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Rob Williams  
#2 Posted : Thursday, September 6, 2012 9:14:25 PM(UTC)
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Originally Posted by: jclisk Go to Quoted Post
The evaporator keeps freezing up. I have replaced the defroster heater unit a couple of times but apparently that is not the problem. What controls the defroster heater unit to keep the evaportor unit defrosted?

If its an older unit it is a timer usually in the back of the fridge section , if newer an adaptive defrost control.Also you need to check the defrost thermostat that is connected in series with the heater.
denman  
#3 Posted : Friday, September 7, 2012 2:08:58 AM(UTC)
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jclisk  
#4 Posted : Friday, September 7, 2012 12:22:25 PM(UTC)
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The model number is MSD2758DRB
denman  
#5 Posted : Saturday, September 8, 2012 1:40:31 AM(UTC)
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Here are your parts
Replacement parts for Maytag MSD2758DRB REF - SXS/I&W | AppliancePartsPros.com

Defrost is controlled by an adaptive defrost control board (Item 13 in Section 2)
Click on it's picture for more info and a Q&A section on it.

If the defrost thermostat and the heater are OK then the board is probably shot.
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