Defrost Cycle Not Working - ApplianceBlog.com - Appliance Repair ...
I have a defrost cycle problem with my Kitchen Aid refrigerator. It is a model KTRC19MKSS00. The condenser is frosting up about every two days. I have had it apart several times trying to resolve this trouble. This model has an electronic defrost control board that operates the defrost as well as the cooling cycles. It has on the board a relay that is a SPDT. When released it applies 115vac to the cooling circuit and when operated it removes power from the cooling circuit and supplies power to the defrost circuit. The defroster element is supplied power from this board through a bi-metal. On the control board is two test terminals that are electrically connected to either side of the bi-metal. I can force the defrost cycle to initiate per the instructions on my service and wiring sheet #2213196REL. There is a helpful hint on the service sheet that indicates a possible open bi-metal if the relay operates and then releases within about 30 seconds into the defrost cycle. This is happening on my test. I have tested the bi-metal and it has less than one ohm across the terminals. As a precaution I have replaced the bi-metal. I am still having the same trouble condition. I have been able to jumper across the test terminals on the control board, thus bypassing the bi-metal and the defrost cycle runs the complete 18 minutes. I don't have enough detail information on the wiring diagram to troubleshoot the control board but I am wondering if it may have a trouble causing the relay to release prematurely. I'm trying to avoid buying a control board until I'm sure that is the trouble. What suggestions might anyone have? You are correct. I'm sorry about the error on my post. We are talking about the evaporator instead of the condenser. I know electronics pretty well but very little about refrigeration. Thanks for the input. I'll order the board directly. I had pretty much eliminated the other possibilities for the trouble but needed a little encouragement. ...
Kitchenaid KSCS25INWH01 not defrosting - ApplianceBlog.com ...
Hi, I have a Kitchenaid that has a issue the mod. Is KSCS25INWH01 ser. #ST4432763 the service and wiring sheet is # 2223419v this all started after the refer. Door got left open a little bit over night, I think it is coincidental. The evaporator coil will frost up on the fins and ice up on the sides really bad in about 3 to 4 days after I remove the back cover and de-thaw it with a hair dryer. I have had to do this 3 times now, the freezer set @ 6 degrees and the refrigerator set @ 35 degrees, I have checked the air damper and it is not froze up and is open. The one funny thing that I have notice is the drain in the bottom will freeze closed, I can pour water through it once the little ice plug melts when I am defrosting it. I ran it through the diagnostic check after it was at normal operating temp and everything was ok till I got to step #7 it said the bi-metal was open, the chart said to bypass it, how do I do that? Any help would be greatly appreciated. I was a little hesitant about cutting the wires so I figured a better start asking some questions. So now when I do the diagnostic check with the bi-metal by passed the heater elements should come on rite? And the read out should indicate the switch is closed now rite? How hot or warm do the elements get? If that all checks out good am I to assume that the bi-metal is bad?
Source: Kitchenaid KSCS25INWH01 not defrosting - ApplianceBlog.com ...