Where is it frosting, condenser or evaporator? If you mean frosting on evaporator line to compressor, probably iced up evaporator. If you mean frosting after condenser by capillary, unit short of gas/ blocked.
SOURCE: Amana BX22A2W - freezer works, fridge not cooling
had same exact problem - followed advice for fixing same problem in similar refrig. took of the back panel off the freezer section - 8 hex head screws - and found the cooling fins all frosted over.
SOURCE: Amana BX22A2W - freezer works, fridge not cooling
Check the damper in the top back of the fresh food section. make sure that it is open and air is coming through it.
SOURCE: Compressor & Evap. Fan both work for 12 hours then evap stops
I believe that because defrost is done by the mother control board this is why this is happening the part of the board that controls defrost is malfunctioning and the only way to resolve the problem is to replace the mother board part number WR55X10656 You can find the replacement board at these places below. Sea Breeze
http://appliancepartsse.blogspot.com/
http://appliancepartsse.blogspot.com/
Testimonial: "You were right, thanks for your help. The control board was bad. That is what I suspected, but I wanted a second opinion."
SOURCE: Refrigerator does not cool.
Ok , I'll help you .
Pull the refrig out from the wall , and unplug . Remove the 8 " X 10 " panel on the back of the refrig . Inside this panel , is the main control board .
Remove the blue plug with 3 larger wires going to it . Looking at the plug , you will see : wire1 , wire2 , space , wire3 . Get a short piece of insulated wire , and remove about 1/4 inch of insulation , from both ends . Insert 1 end of the wire , into the slot of wire2 , and the other end , into wire3 .
Plug the refrig back in .
After about 2 min , look inside the freezer , behind the bottom crisper , and look for a red glow . This glow , is the defrost heater .
If no glow , this is an indication of a shorted defrost heater , or bad defrost thermostat , both of which are located behind the rear freezer panel . Unplug the refrig , and reinstall the blue connector , and the 8 x 10 panel .
The pt # for the heater is WR51X10101 , and the part number for the defrost bimetal is WR50X10068 . Both should be replaced . The heater is at the bottom of the coils , held on by 2 screws , and the thermostat , is clipped on the top right of the coils , with a blue and pink wire going to it .
If you do see a red glow , reasemble as above , and remove the rear inside freezer panel . At the top of the coils , on the left , you will see 2 white wires attached to a 1 " piece , which is clipped to the coils . This piece is the # 4 thermistor ( evaporator thermistor ) . Pt # WR55X10025 . Also replace the # 5 thermistor , ( freezer thermistor ) which is at the bottom of the panel , slid into a holder , also with 2 white wires going to it . Both thermistors , sent readings of temp , by coldness resistance , to the main control board , which then decides if it needs to defrost , or cycle off due to coldness reached .
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