On Friday lawn guy with weedeater whacked wires to my AC unit which shut it down. In Saturday HVAC technician came out to fix. He taped up loose wires and replaced fuse. After he left thermostat displayed Y1 wire problem, so technician came back. Supposedly fixed but then thermostat again showed Y1 problem. Thermostat worked fine before this happened, so I shouldn't have to replace. What do you recommend?
