I am diagnosing a heat pump. The customer said it worked great during the cooling season, but when she turned the thermostat to heating, the thermostat started smoking. I took off the cover to the thermostat, jumpered the red with yellow, ac worked great, then jumpered red with white, and...

Good day, friends! I need to replace the Exhaust Fan in my Water Closet - total space is 15 ft sq. (Hasn't worked well for awhile and now it's dead, but I'm not sure it ever adequately ventilated the shower next door.) There is no exhaust fan in the larger space outside the W/C containing the...

I was replacing a coil in the attic of a 1.4 million dollar house when I had a little accident... I pumped all the refrigerant back to the compressor and made sure there was no pressure in the lines, then I attempted to sweat the connections off the coil. The liquid line popped off with no issue...