Hooking up Honeywell TH8320WF In place of Trane XT500 (old) Thermostat . Heat Pumps and Electric Home Heating - Hooking up Honeywell TH8320WF In place of Trane XT500 (old) Thermostat - I need help hooking up thermostat. Have hooked up a few and this one is throwing me for www.doityourself.com
