James has maintained our HVAC business system for almost 20 years. He has expertise from home heating/cooling to large HVAC commercial systems with big compressors, evaporators, condensers and hot-water boilers. This has saved us tons of $$ over the years. He knows everything from pillow blocks, to superheats to TEM valves -- he has swapped our 25 HP TRANE compressor with for a rebuilt unit, re-braised copper joint-leaks in the refrigerant condenser system, changed refrigerants, etc. When we call him and describe our problem, he typically will ask us a couple of questions and immediately say "you have a slipping condenser fan-belt". Or "That temperature difference means that your coolant temperature is too high, probably your condenser us plugged up with cottonwood tree fluff. " Or "sounds like you water level sensor is stuck in the up position, or could be a leaking intake pressure regulator." Or "sounds like a bad contact in a 3-phase contactor." He even has a shop fso he can do fast-turn sheet- metal ductwork. This guy is an electro-mechanical systems genius -- no exaggeration. read more