Question about Amana ABB1927DE Bottom Freezer Refrigerator
The refrigerator and freezer work fine for a week or so as the evaporator coils gradually ice up until the are completely iced and I need to turn it off and defrost.
This has be going on for the past 6 weeks. The time for the coils to freeze up is getting shorter each time.
I replaced the defrost control circuit board when the problem first occurred but there was no change.
The most recent time I used my air compressor to blow out the drain after it was defrosted. The result was a faster freeze up. It has been just 4 days and the coil is almost completely iced.
The defrost heater on this model is black. same material the element in your oven is made of. it runs across the bottomof the evap. slightly going up thr right and left sides of the evap. if you trace the wires back youll find that one side will hook into a defrost thermostat. this part is clipped up at the top of the evap. its about the size of a nickel. look at it to see if its swollen. the plastic top of it will look like its popped off alittle if its bad, inmost cases. either one of these two parts, defrost thermostat or the defrost heater can cause your problem
Posted on Nov 27, 2007
The time is really fast for the Evaporator to be freezing up like Sparkgap said. A possible solution is that you Defrost heater is burned out. It is usually located at the bottom of the evaporator encased inside a Glass Tube with a wire connected to both ends. If you have already accessed the Evaporator coils look for this heatrer and remove it for examination. What I find is the heater is usually burned in two. You can use a Volt ohm meter to check the resistance across the two connections, It should read less than 20 ohms. You can get another heater at www.repairclinic.com. Since you are icing up so fast, you might have your thermostat for the freezer set to wide open making it run all the time to gain the coldest temp possible. Please do not knock what Sparkgap said as you could have some moist air getting into your freezer through the door seals. If your heater is ok, then it may be the Defrost temperature sensor. This is unlikely, but still possible. I am not familiar with the Amana fridge so I am not sure where this sensor is located. It does have to be somewhere around the evap coils.
Posted on Nov 08, 2007
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