Question about Coleman Mach III Air Conditioner
Sounds like you have a bad thermostat. If you pull the face of the thermostat off, you should see colored wiring. With the thermostat set on High/Cool, check the yellow for power, 12VDC. This is the compressor feed. Also, check the Grey wire on the tstat. This is the high fan feed. If you have power at both, then the problem is probably in the relay board. If you do not have power at both, then you need to replace the tstat.
Hope this helps,
Posted on Jul 03, 2009
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Posted on Jan 02, 2017
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