NO C TERMINAL ON THE FURNACE HYDROSTAT

[Tmnckrsn]

I just purchased a nest thermostat.  Two wire TT connection at Hydrostatic.   Thermostat indicates error N260. Then I ran a new wire with three conductors 18 gauge only to find that my high end 5 year old Buderus C-115 with a Hydrostat 3250-Plus furnace controller which has no C terminal.   Suggestions?

[Ryan_G]

Hey Tmnckrsn,

Thanks for reaching out and we're sorry for the delay.

Could you take a photo of your current wire at the Nest Thermostat terminal and the configurations from the terminal block of your HVAC?

I hope to hear from you soon.

Regards,

Ryan

[Ryan_G]

Hey folks,

Thanks for visiting the Google Nest Community. 

Since this thread hasn't had activity in a while, we're going to close it to keep content fresh.

If you have additional questions, feel free to submit another post and provide as many details as possible so that others can lend a hand. 

Hope this helps!

Kind regards,

Ryan