If you installed more than a few thermostats, you’re likely to have come across many that have four wires. Typical 4 wire thermostat (t-stat) wiring examples follow. Some have the common (C) wire, while others do not. Both examples of How to Wire 4 Wire Honeywell Thermostat we describe next. How to Wire 4 Wire … Continue reading How to Wire 4 Wire Honeywell Thermostat