Question about Kenmore 74870 / 74873 Top Freezer Refrigerator
Hi, I noticed the other day that the fridge was not turning off. So I took the cover off of the back of the inside portion of the freezer section and found that the coil was all frozen over and the opening where the cold air was suppose to be going down to the lower part of the fridge was completely blocked by ice. I cleaned the ice and the fridge started to work properly. My question is do you think that the Timer for automatic defrost is bad, or you think the Thermostat is bad? Or there is another part that is no good? Help Thanks
Yurkat, you want to make sure the defrost system is working. Bottom side of the controls you should see a hole where you can advance the defrost timer into defrost, turn clockwise until you hear a click. The calrod heater that sits under the evaporator should come on. If it doesn't, check the harnesses to both side of the heater and make sure they are in. If the heater still doesn't come on, you will have to test for voltage at the harness to the heater, should read 120V at the harness. If you have the voltage, it's the heater although I don't see too many of them fail. If you don't have the voltage the problem would be in the defrost terminator (bimetal) or the defrost timer itself. From what you were describing, evap frozen over and constant run, sounds like the thermostat could not be satisfied and therefor the constant running. Check out the pic of the bad bi-metal. Catriver..post back.
Posted on Mar 04, 2007
It is more likely to be the thermostat, it is very common on fridge freezers which only have 1 compresser. thermostat should be no more than 10-12 pounds from a spares outlet. they do universal stats so it would worth trying at that price. hope this helps
Posted on Mar 04, 2007
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