Upstairs Heat Pump System: I found the upstairs Honeywell thermostat’s screen to be blank and unresponsive to any touch on the touchscreen. I started my diagnostic by checking power between the low voltage wiring and found no power present. I then went outside and checked the contactor relay and found that the relay coil had shorted out. Installed a new relay at the heat pump and tightened/secured all wiring terminals. Cleaned out the condenser electrical area as there was a significant amount of cobwebs and dust build up. Restored power to system and checked over everything. Everything is working at this time.