Arrived to no cool. Geothermal heat pump installed in 2013. System had no pressure on the line set. Found a leak at the reversing valve. System will not hold refrigerant for more than a few minutes, it is a major leak. Estimate is to replace the reversing valve, modify the line so this doesn’t happen again, and recharge the system with r410a refrigerant. Due to the age of the equipment, technician suggests replacing the unit with something new, more efficient and something that has parts and labor warranties.