See if anybody has ran into the particular problem below. I have twice. 10-12 year old Coleman split heat pump. Heat mode cuts out on high pressure in about 30 seconds. Cool mode pressures are normal for a 60degree day. No refrigerant has been added to either system since installation. Basically have to add R-22 for A/C mode and remove in the winter time. Sounds like an airflow issue due to extremely high head pressure in the winter time. If I recover freon to decent heat mode pressures when I switch to cool mode pressures way too low. Bad part is nothing has changed at Air Handler on either system. Filter is clean, Indoor coil is clean, Blower wheel cups are clean. Kinda tricky. A couple of people have mention metering device problem but I dont see it. Any suggestions??????????