JamesTorclethorpeB3
Newbie
I am new to the site I have a 99 suburban k1500 in which I have replaced the AC compressor condenser accumulator metering device and lines I have replace the lines with single cab lines pulled vacuum and charged (I am a HVAC technician by trade)
When I start the AC it will run for about 10-15 seconds and then will smoke the HVAC controller blew two of them so far the original and a replacement
Found a wiring diagram of the AC says there's supposed to be a diode between the clutch signal and ground to the compressor and I'm not seeing one on my harness
I'm leaning toward the diode is not blocking the signal back clutch shuts off and back feeds to controller?
Anyone have this issue before
I have also replaced blower motor and resistor
When the controller is good the light will be on the the AC button
When it smokes it will only run at the feet setting for air and no light to the AC switch is on
When I start the AC it will run for about 10-15 seconds and then will smoke the HVAC controller blew two of them so far the original and a replacement
Found a wiring diagram of the AC says there's supposed to be a diode between the clutch signal and ground to the compressor and I'm not seeing one on my harness
I'm leaning toward the diode is not blocking the signal back clutch shuts off and back feeds to controller?
Anyone have this issue before
I have also replaced blower motor and resistor
When the controller is good the light will be on the the AC button
When it smokes it will only run at the feet setting for air and no light to the AC switch is on