Wiring question

[Jwit10]

This is my old set up….am I still able to use a nest since it does not have E1 and E2 wires? 

[EdmondB]

Hello ClydeM,

Thanks for posting here in the Community. Based on the photos of the wires from your current thermostat, this is a proprietary system. This is not compatible with any type of Nest Thermostat. However, some proprietary systems can be rewired by a pro installer to be compatible. Check out this link for Nest thermostat compatibility.

Let me know if you have additional questions.

Best regards,
Edmond