Cooling plate stays warm. "Radiator" below is cool. Is problem the reversing valve solenoid? How do I test? What is a Good/bad reading? Is there a process of testing problems in a series to best find solution? Ice maker was working and it suddenly stopped cooling.
Answer Hello Bob,
While it is much easier to help diagnose a symptom with a model number so we know your units' exact configuration, I'll try to hit on some high points. First off, does the compressor run? If not, you should check the compressors' start relay and overload. If they test good, you should check for 120Vac to the overload. If the compressor is running, is it hot or cool? If it's hot, you may have a sealed system restriction. If it's cool, you could have a freon loss. If the compressor runs and is just a bit warmer than body temperature, the reversing valve could be defective. The reversing valve or "hot gas valve" as the manufacturer calls it, could have a mechanical failure that is not indicated with a test with a test meter. This means, it could be stuck mechanically so it cannot open and/or close. If you could post a model number, we can send you some illustrated literature on your model for troubleshooting to your e-mail address as we cannot post the literature on this format.