More backgroound info would be helpful-- did this problem just start
this fall, anything done to the unit during the summer etc? An
overcharge will cause this problem, as will lower than normal air flow
across the indoor coil. FWIW, on Rheem/Ruud heat pumps these seem to be
more critical than on some other brands. Granted, part of this is the
fact that a lot of others don't even have a high pressure c/o and many
of the ones that do have have one that is auto reset, but regardless
IMO, they are still a little more finicky than others. I doubt that
there are any parts in the unit that are defective, but w/o being there
anything is just a guess. If by chance refrigerant was added this past
cooling season, overcharge is likely. If that is the case, talk to the
company and explain the details-- if they are a reputable outfit, they
should come back and check it out , and if that is indeed the problem,
fix it at no charge. I know the company I'm with would. Good luck Larry