2014 Carrier GT geothermal three ton non-pressurized two pump glycol. Antifreeze freeze protection is tests between 30 and 35% roughly +5to +10°f freeze protection Electrical diagnostics and repairs Pull new thermostat wire from first floor to basement equipment, confirm correct thermostat setup, trace electrical short to faulty high pressure switch causing equipment to enter limp mode running the compressor, blower fan, and flow center non-stop ”attempting to reset the high pressure switch”. Bypass high pressure switch, research control board dip switch settings. Run test heat pump in low stage and high stage with 87° supply temp and 140° with auxiliary engaged Homeowner understands the water flow restrictions through the DHW heat exchanger and will reroute the 1 in glycol lines ASAP. Running refrigerant pressures under today's conditions are 95 and 300 psi Due to water flow restrictions through the DHW the glycol temperature drop is nearly triple the book specs from 63 to 38