Cync / C By Ge Thermostat Compatibility (+ PDF)

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The Cync Smart Thermostat is compatible with most residential heating and cooling systems.

The chart below outlines the types of HVAC systems that the Cync Smart Thermostat is compatible with.

For some of the most common wiring configurations please review the Thermostat Wiring Configuration and Installation Guide.

Conventional (Furnace and Air Conditioning)	Up to 2 stages of heat and 2 stages of cool are supported. Supports single-speed fan control. Can be installed with a PEK, if a C wire is not present.
Boilers	Up to 2 stages of heat are supported. Cannot be installed with PEK. C wire is required.
Heat Pumps	Up to 4 stages of heat (2 stage heat pump and 2 stage auxiliary heat) and 2 stages of cool are supported. Supports single-speed fan control. Supports geothermal and air-to-air heat pumps. Can be installed with a PEK if a C wire is not present.
Dual Transformer (Boiler and Air Conditioning)	Up to 2 stages of heat and 2 stages of cool are supported. Supports single-speed fan control. Cannot be installed with a PEK if a C wire is not present. C wire must come from the air handler and not the boiler.
Electrical Requirements	Compatible with 24VAC controls. Not compatible with DC voltage systems, such as heating and cooling systems in recreational vehicles. Not compatible with high/line voltage systems, such as electric baseboard heaters. Not compatible with millivolt systems, such as fireplaces and wood stoves.

At the furnace control board the Cync Smart Thermostat requires standard terminals (R, G, Y, W, C). If you do NOT have these terminals present, it is possible with some re-wiring of your equipment that the Cync Smart Thermostat can be made compatible.
The Cync Smart Thermostat does not support proprietary features supported by communicating thermostats, such as a variable fan speed. These features will be lost when using the thermostat.

Cync / C By Ge Thermostat Compatibility