Central Air Thermostat Wiring 5 Wire

May 06, 2021

If the old thermostat has been removed then the approach is a bit more complex but can still be a DIY project. Use the K terminal in place of the Y and G terminals on conventional or heat pump systems to provide control of the fan and the compressor through a single wirethe unused wire then.

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Central Air Conditioning.

Central Air Thermostat Wiring 5 Wire. Compatible with your system and wiring. The THP9045A1023 Wire Saver Module is used on heatcool systems when you only have four wires at the thermostat and you need a fifth wire for a common wire. Wire to serve as the common wire which powers the thermostat.

If the old thermostat is still installed then this will work. For example the Nest Thermostat E wont work with two-stage. Lets start with the simplest approach.

3 Method to Wire a Thermostat. 1 Replace the thermostat wire for wire. Most non-connected programmable thermostats will work with as few as two low-voltage wires common in older heating systems but newer thermostats often require a common wire or C-wire.

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