Freezer does not defrost over time, coils ice up. Seems as if defrost element is not kicking on. I am very handy and comfortable in repairing things, this is NOT my first time.
I have checked for continuity on the heating element wrapped around the cooling coils and it DOES have strong reading. The thermodisc has no continuity reading when hot (as it should) and last time I check it after I had removed the disc, placed it in another freeezer to close the circuit, it DID have continuity (closed) circuit reading. Am I correct that both of these items are OK?
Is there any other device between the lower unit components (heating element and thermo disc) that could give this problem or is it the motherboard that has gone bad.? ALL else in the refrigerator works fine.
I can completely defrost externally with a rotary house fan, close freezer door back and turn unit back on, and within days to a week or two the cooling coils have iced over enough that they are penetrating into the internal freezer cabinet, causing no cool air to make it to the upper compartment, causing its temp to climb to the 50-60 degree level and the freezer temp to climb well above freezing. Freezer comp. not opened that much. Just two occupants of home.
With me testing the heat element and thermo disc, looks like moboard, I do NOT want to purchase mobo if that is not the issue, but I think my efforts thus far have narrowed it down somewhat.
Your help is greatly aprreciated.
Jeff Kirkland
Mt. Pleasant, SC
843-881-0992 (mornings)