Concerned, but all came out fine
The first AC unit failed. There is some sort of secondary start-up Capacitor, forget what it's called, but the AC unit failed soon after it was installed. Coffman brought out a new unit, installed the secondary start-up cap, and it was mentioned 'these models' have failed a few other times recently in the field. This was good info to know, but did not make me feel good about long term reliability. The 2nd unit is still working (as far as I know, it's wintertime and I have not tried it for several months). I went with a smaller Heater per recommendation (110BTU vs 135BTU original unit) and a 4 Ton AC, vs a 5 Ton original. I hope this was not a mistake - but I won't know until a few years from now. The heater does turn on and off many times more than the older original unit - but this could be due to how cold it is outside (house cooling faster when it's cold out (10 degrees or lower)). There are several variables that might cause this. Our heating bill is about the same, but not lower for sure.