![Have a Y in old thermostat in C port on old; tried a C wire adapter to new thermostat and got power and air, but air condenser would not turn on : Have a Y in old thermostat in C port on old; tried a C wire adapter to new thermostat and got power and air, but air condenser would not turn on :](https://preview.redd.it/have-a-y-in-old-thermostat-in-c-port-on-old-tried-a-c-wire-v0-vtt06l9lwrhb1.jpg?width=640&crop=smart&auto=webp&s=a98f550c1e172cf935f1a10b5f7139507221b2c1)
Have a Y in old thermostat in C port on old; tried a C wire adapter to new thermostat and got power and air, but air condenser would not turn on :
![N1 Common C Wire Adapter AC Transformer 24V 500mA Universal Compatible With WIFI Smart Thermostat and Doorbells. Nest, Ring, Honeywell, Ecobee, Sensi - White (2 Pack), New - Walmart.com N1 Common C Wire Adapter AC Transformer 24V 500mA Universal Compatible With WIFI Smart Thermostat and Doorbells. Nest, Ring, Honeywell, Ecobee, Sensi - White (2 Pack), New - Walmart.com](https://i5.walmartimages.com/asr/09203896-47fc-41e3-ba72-f287370a4d87.ed5243cafd7ef72061698e72f285b1f7.png?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
N1 Common C Wire Adapter AC Transformer 24V 500mA Universal Compatible With WIFI Smart Thermostat and Doorbells. Nest, Ring, Honeywell, Ecobee, Sensi - White (2 Pack), New - Walmart.com
![Xwartre UL Certified Thermostat C Wire 24V Transformer, White Adapter Compatible with Honeywell, Nest, Emerson, Ecobee, Wyze Thermostat and Most Doorbells (26FT Power Cable) - Amazon.com Xwartre UL Certified Thermostat C Wire 24V Transformer, White Adapter Compatible with Honeywell, Nest, Emerson, Ecobee, Wyze Thermostat and Most Doorbells (26FT Power Cable) - Amazon.com](https://m.media-amazon.com/images/I/613n7yyTw8L.jpg)