Bernie for Model Number ET22RKXGT03 My refrigerator wasn't defrosting; freezer fan working, everything else normal. I took the Defrost Bimetal out of the circuit and tested it at both room temperature (showed open circuit) and freezer cold (continuity displayed). I also tested the Defrost Heater out of circuit and it shows about 33 ohms resistance. Next I turned the manual turn screw on the Defrost Timer until the compressor stopped as I thought that would key up the power to the Defrost Heater. It did, and the heater got hot. So, at this point I thought for sure that I had identified the Defrost Timer as the culprit - that the motor wasn't rotating the contacts. So, after 25 minutes I returned to the refrigerator expecting the refrigerator to be stuck in the defrost mode - well it wasn't. The compressor was on. So now I'm left with only one remaining possibility - that it is still the Defrost Timer except that it hangs up somewhere in its full cycle (which I didn't check) either consistently or randomly.
Answer Hello Bernie, There are two possibilities in the case you described. The defrost timer W10822278 contacts could be burned so they do not always make electrically OR the defrost thermostat WP4387503 could be weak and opening prematurely. Either of these can impair the defrosting of the coils. If you replace the defrost timer, the black lead connects to terminal number 1 for the continuous configuration. Read More... Answered by AppliancePartsPros.com | Tuesday, July 28, 2015