Honeywell Basic Thermostat Wiring Diagram

That is a basic honeywell thermostat wiring diagram for a single stage heat pump.

Honeywell basic thermostat wiring diagram. The thermostat uses 1 wire to control each of your hvac system s primary functions such as heating cooling fan etc. C 24 vac common you might see blue purple or brown typically used for this wire. The thermostat makes a contact on both a rise and on a fall of room temperature. S indoor and outdoor wired sensors t6 pro and t10 pro only y compressor stage 1 cooling y2 compressor stage 2 cooling g fan c common.

If you have a system that both heats and cools your house you need a more complex thermostat with more wire terminals and if your system incorporates a heat pump you need even more wire terminals. Honeywell thermostat wiring diagram 4 wire examples the table above provides a more complete list of honeywell thermostat wiring colors and their uses. Basic electricians pouch hand tools. Our wiring diagrams section details a selection of key wiring diagrams focused around typical sundial s and y plans.

Wiring instructions for a honeywell heating thermostat. Wiring a honeywell thermostat. If you check the honeywell thermostat ct31a1003 wiring diagram you ll see that it requires only two wires. Depends on personal level experience and ability to work with tools.

Your system likely only has one transformer as most typical residential systems only use a single transformer for control. At left the thermostat wiring diagram illustrates use of a honeywell t87f thermostat in a 3 wire application as a spdt single pole double throw switch such as used to control low voltage motors electric radiator valves zone valves. This is because it s a very basic thermostat designed only to control a heating system. The honeywell home trademark is used under license from honeywell international inc.

But here is a list of the most common wire color mappings as seen in many four wire t stat setups.