Carrier Infinity Thermostat Wiring Diagram Jun 2026

In a zoned setup, the thermostat connects to the Zone Board via the ABCD bus, which then distributes signals to individual dampers and sensors. Important Installation Tips Carrier Infinity Wiring Basics

Connect the outdoor unit to the indoor unit using standard terminals on the indoor control board. Zoning Systems

A common scenario homeowners face is upgrading their thermostat to the fancy Infinity Control while keeping older, non-communicating HVAC equipment. Or, perhaps you have an Infinity Furnace but a standard outdoor AC unit. Carrier Infinity Thermostat Wiring Diagram

If you are looking at a diagram and see any terminal labeled Y, W, or G, you are not looking at a true Carrier Infinity Communicating Thermostat diagram—that is for the "Edge" series or older non-communicating models.

When used with standard equipment, the Infinity thermostat operates like a very expensive conventional thermostat. You will utilize the wire harness adapters often included in the box (or a standard thermostat cable). In a zoned setup, the thermostat connects to

on the backplate are used for a Remote Room Sensor, not for an outdoor temperature sensor. Common Components in Diagram Recommended Color Communication Data Communication Data 24V Common Remote Room Sensor for a specific model, or help bypassing the ABCD system for a smart thermostat?

On the back of the Carrier Infinity Thermostat, you will not see the standard R, W, Y, G terminals. Instead, you will see a terminal block labeled: Or, perhaps you have an Infinity Furnace but

This "daisy chain" allows the thermostat to query the outdoor unit's status, monitor compressor health, and adjust dehumidification modes based on outdoor humidity.

Carrier thermostats usually ship with a specific 4-wire bundle. The colors are standard for their equipment, though they function differently than standard HVAC colors: