Carrier Infinity Thermostat and Google Nest 4th Gen

[dancad]

I have a Carrier Infinity system with a 4 wire thermostat that I want to replace with a Google Nest Gen 4. The wiring is a 4 wire system (green, white, yellow and red) that are marked as A,B,C,D. Can the Nest work with this system or do I need an adapter or to rewire the system ?

[Patrick_Caezza]

@dancad 

The Carrier Infinity uses a propitary interface incompatible with Nest Thermostats.