We recently purchased a new heat pump - a Carrier 2-ton performance series with a variable speed air handler. The expansion valve has already been replaced.
We've noticed that the system outside doesn't seem to cycle off, that is the fan is always turning on the outside unit. Is this normal? How often should it cycle off?
We've also noticed that when the outside temperature is 93 degrees, with the thermostat set at 72 degrees, that the system could not cool the house to under 76 degrees. I heard that we should only expect a system to cool the house to 20 degrees less than the outside temperature. Is this correct? Should we be concerned that our system is only getting our house 17 degrees cooler, or is that bit of difference considered negligible?