Coleman-Mach 48008-966 AC large voltage drop
Back in October I got a new Coleman-Mach 48008-9660 3 P. S. heat pump and a 9630-715 non-ducted ceiling assembly. With warmer weather, I've noticed a problem with the air conditioning. On LOW COOL...
Forum Discussion
Since you have mechanical controls, I would suspect a BAD tstat. The points are opening and closing too fast and causing compressor short cycling. The bad thing about mechanical tstat systems is there is no 3 minute time delay built in the system for stopping short cycling. The ONLY difference between HP and COOL is the system reverses the coolant. So, if functional on HP and, then the problem points to the tstat, not a capacitor or compressor. Doug
