Before the fighting starts about term definitions, let's just settle on using “adjustable drive pulley” and “sheave” interchangeably to describe the belt-driven power transmission device shown above. Second, for the newer tech, you shouldn't be altering these sheaves so that the belt rides lower or higher in them unless you know EXACTLY what you are […]

Suction pressure, head pressure, subcooling, superheat, delta T. Taking all five of these calculations into account on every service call is critical. Even if you must do further diagnostic tests to pinpoint the problem, these five factors are the groundwork before more effective diagnostics can be done. I would also add static pressure as an […]

First off, the correct acronym for a GFI (ground fault interrupter) is a GFCI (ground fault circuit interrupter). The purpose is to act as a safety device to protect from electrical shock. GFCIs can be built into outlets, circuit breakers, and even extension cords and are generally used for safety in wet environments like bathrooms, […]