Originally Posted by t walgamuth

Water to air heat pumps do a lot better. Instead of trying to take heat from the air which is at 27 f they will be taking heat from the ground which if deep enough will be as warm as 50 f.

The most effecient type is the open loop type which takes water from a well and discharges it into a stream or lake, or into a second well so that it does not deplete the water table.

It sounds as if the OP's heat pump is working normally.

Tom W