Discussion Starter · #1 ·
I have a Goodman rooftop package unit. The problem I have is only one. The A/C only works when the fan is set to ON and not on Auto. When set to AUTO, I hear the A/C compressor humming for a few seconds then always immediately stops humming, and the fan never turns on. When I set the thermostat to Heat and set to FAN AUTO, the fan turns on after a few seconds when I call for heat. Why doesn't my fan turn on when I call for A/C?