The Honeywell Home THP9045A2098 C-wire power adapter (wire saver) powers a Wi-Fi thermostat that needs a C-wire (24V common) when the existing thermostat cable has only four wires (R, W, Y, G). It mounts on the furnace or air handler and combines the Y and G signals onto one wire (K), which frees a conductor to carry C. No new thermostat wire has to be pulled.

Use it with the Honeywell Home T6 Pro Smart TH6220WF2006 and TH6320WF2003 Wi-Fi thermostats, as well as other Honeywell Home smart thermostats and RedLINK 8000 series thermostats.

Key features

• Adds a C-wire on 4-wire heating/cooling systems
• Works with heating/cooling and cooling-only 24V systems; not for heat-only systems
• Push-in terminals (R, K, C, W) with attached equipment cable
• Magnetic mount for quick mounting on the equipment cabinet
• Includes adapter with attached cable, magnetic mount, wiring labels and quick start guide
• Compact: 2.6 x 2.6 x 1 in.
• Not needed if a C-wire is already available at the thermostat
• 1-year warranty