Preventative maintenence inspection on 2016 Waterfurnace 7 Series geothermal unit. Blower and compressor compartments in clean condition. 30x32x2 air filter in good condition. Test ran in electric strip heat with 29F temperature rise. All heat strips come on properly at 20A. Test run geothermal heating with 23F temperature rise. Refrigerant pressures are within spec for heating mode. Variable speed flow center and loop pressures are within spec. Electric strip heat and geothermal heating tested together with temperature rise of 49F. All measurements made withing specifications. System is operating properly, efficiently and ready for Winter.