What Is RC and RH On A Thermostat?
When you are troubleshooting an HVAC fault or have to replace a thermostat you might often get lost between all the wiring and their connections to the thermostat’s terminals. Especially the terminals marked “RC” and “RH” can be confusing. What are ”RC” and “RH” and what are the differences between the two? “RC” and “RH”