Air Conditioning Thermostat Wiring Diagram

Can't figure this 3 wire system out or find anything in postal about it Wiring diagram for ac unit thermostat Thermostat wiring wire heat color diagram pump air nest guide common goodman colors honeywell code labels heater aruf handler wires

Can't figure this 3 wire system out or find anything in postal about it

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Wiring Diagram For Ac Unit Thermostat

Can't figure this 3 wire system out or find anything in postal about it