Hey Folks!
I've been searching for a few days to get some details on the outdoor temperature control board for my Coleman Mach 15 AC/HP (48000 series). I've got no cold air coming from the unit, and I've done a bunch of troubleshooting. However, I'm stuck on what exactly to test to determine the problem which I suspect is something with the Outdoor Temperature Control Board.
Outdoor air temperature: 90*F
Main AC (Center) (problem unit)
Secondary AC (Garage)
Troubleshooting steps:
What the heck does the board do? It has another orange wire that routes to the two ports on the lower board meant for a heater (which I don't have)
Thanks for any help!
Kyle

Factory image:

I've been searching for a few days to get some details on the outdoor temperature control board for my Coleman Mach 15 AC/HP (48000 series). I've got no cold air coming from the unit, and I've done a bunch of troubleshooting. However, I'm stuck on what exactly to test to determine the problem which I suspect is something with the Outdoor Temperature Control Board.
Outdoor air temperature: 90*F
Main AC (Center) (problem unit)
- 82*F at return
- 83*F at nearest vent (probe)
Secondary AC (Garage)
- 86*F at return
- 62*F at nearest vent
Troubleshooting steps:
- Compressor not running
- Fan high/low operating properly
- Thermostat working correctly
- Tested capacitor (uF) (good)
- Tested compressor (ohm) (good)
- Output of the lower control board was 115VAC coming from the purple wire to the Outdoor Temperature Control Board
- No AC output on the outdoor temperature control board (black wire to the compressor)
- Removed coil sensor
- Close coil sensor ports
- Bypassed the board and connected purple and black wires (similar to my other AC units without the outdoor board), and compressor ran as expected
What the heck does the board do? It has another orange wire that routes to the two ports on the lower board meant for a heater (which I don't have)
Thanks for any help!
Kyle

Factory image:

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