Quote:
Originally Posted by 16ACE27
You MAY have a problem or you MAY not be hearing the speed difference - it isn't much. I have to really listen to hear the difference on my A/C.
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Since the Coleman mach 3 and mach 15 have only two motors (compressor and fan) the low speed is approx 85% of the high speed. Any lower speed would seriously degrade the operation as the compressor's speed is not controlled. Newer designs like the Coleman mach 8 have three motors, so the evaporator fan is separate from the condenser fan and the unit is much quieter on low (ideal for the bedroom).
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