Years ago, it was common for shops to have a central power source that drove all the tools through a system of belts, wheels and driveshafts. The power was routed around the work space by mechanical ...

Diagnosing a faulty compressor valve is something HVAC technicians have to deal with on a semi-regular basis, and while a bad valve is often not the main reason a compressor fails, it is an integral ...

The problem: Air conditioning either does not cool, or the compressor makes a grinding or groaning noise as it does cool. Either symptom is intermittent. This may be due to a faulty air-conditioning ...