The thermostatic expansion valve (TEV or TXV) is erroneously considered by some to be a mysterious and complex device. As a result, many valves are needlessly replaced when the cause of the system ...

The problem: A piston-type reciprocating compressor has had valve damage, or the valves just are not sealing for some reason. This low-temperature refrigeration system has a thermostatic expansion ...

One of the most common repairs for an air compressor is when the unloader valve stops working. Fortunately, it's also a fairly easy fix that doesn't require a lot of time or experience to address.

Air-conditioning compressor switches burn out. Thermostatic switches fail. ... which is a manually operated cable that opens the hot-water-valve vacuum switch and heater-core air door.