I hope that someone can either help me or perhaps refer me to a technical group such as this one specializing in refrigerators. This is a bottom freezer unit that we got four years
ago. The refrigerator section is running between 40 and about 46 degrees and the freezer is at 42.
We cleaned all the dust out of the back and bottom and there doesn't seem to be any improvement. I am an electronics technician however I don't know too much about refrigerators except that they are expensive to have fixed. I was hoping that someone might be able to point me in the right direction to troubleshoot this thing.
I did find something online that mentioned checking the defrost heater in the freezer
section. The heater looked good. It then mentioned to check the fuse that is wire tied to the defrost coil for continuity. Well there appears to be two fuses, or perhaps they are sensors? One is connected on a pair of orange wires and the other connected with a brown and red. The orange pair shows continuity but the other pair is open. Of course one device may be a thermistor too or it could be a NO while the other could be NC. My real problem is that I really don't understand enough about the theory of operation. The unit is
only four years old.
I now have a service manual that someone sent me but it is not very well written and a bit confusing. We're going to try to run through some of the diagnostics tomorrow. I should mention that there was a slight amount of ice on the freezer coil only in the area of
what looks like those two thermal devices. I don't think that the ice was enough
to cause any problems. As soon as we pulled power to check this four wire device the small amount of ice quickly melted. This one device is a bit ambiguous though. They don't really spell out exactly what it is. It is wire tied to the upper right side of the freezer coil and looks like a sort wafer with four wires on it. It appears to be two separate devices. and as I mentioned, one appears to have continuity and the other seems be open. If in
fact they are two fuses then maybe we found the problem, (or the result of it). I can't tell from the schematic why there are two devices fastened to that freezer coil and exactly what they are. It is for certain though, they are in intimate thermal contact with
the coil. I was wondering if anyone is familiar with this model and perhaps you know how to help me. Thanks for any assistance, Lenny