Refrigerator Defrost Problem
by Kiet Busby
I have a GE Profile Model #PDS22SCRARSS fridge with a defrost problem.
I viewed your YouTube video on defrost problem and read your page on this problem. This is what I've checked so far and need assistance in what to check next.
I removed the defrost heater along with the thermodisc(fuse-m) from the freezer and put them in my garage to test. After testing these two items per your directions, I did one more test. I directly wired the defrost heater with the thermodisc to an extension cord, plugged the cord to an outlet for 10 seconds and the defrost heater started heating up.
This tells me there is nothing wrong with either of these items. Is this an accurate conclusion?
Question 1: I'm getting continuity from the thermodisc at zero degrees and at room temperature. When is it suppose to open or does it open?
Question 2: In your video instructions, you indicated to check the evaporator thermistor and you got 16.3 k ohms. Is this reading when the thermistor is at zero degrees or at room temp? Should this check be when the thermistor is at zero degrees or at room temp?
Thanks for any assistance.
As for your first question the thermostat should read continuity at any temperature below 140 degrees.
The Thermistor reads 16.3K ohms at 32 degrees. This is why I suggest testing before the ice is melted. The thermistor will be cover with ice and should be at or close to 32 degrees. The thermistor is very common almost as common as the heater now. At one time I wasn’t seeing many thermistors bad at all but now they are going left and right.
I have a page just for testing thermistors How To Test A Thermistor On A GE Refrigerator
If the ice is already melted this page will help more. But basically it says that if you place a thermistor in a cup with ice and some water for five minutes it should be at or around 32 degrees which should bring the thermistor to 16.3K ohms +/-5%.