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Nest C wire connection to furnace without a C terminal.

DanDel
Community Member

My 'old' thermostat only had 2 wires, red (connected to Rc) and white (connected to W).  I reran a 3 wire line to use as a common, C connection. However, I'm not sure where to connect the C wire to the furnace. There isn't a C terminal on the control board.  Is there somewhere I can tap into a common 24V wire? The boiler is a Weil-McClain Gold GV, series 4.   

4 REPLIES 4

DanDel
Community Member

I also wanted to add that the new thermostat is a  regular Nest thermostat, not the learning or E thermostat.

Jake
Community Specialist
Community Specialist

Hey there,

 

Sorry for the late reply. I wanted to follow up and see if I could be of any help. If you are not seeing a C terminal on your HVAC system, I would recommend having an HVAC pro come out and take a look. Please let me know if you have any questions from here, as I would be happy to take a closer look and assist you further. 

Best regards,
Jake

Jake
Community Specialist
Community Specialist

Hey there,

 

I wanted to check in and see if you had any questions from here. Please let me know, as I would be happy to assist, and answer any you may have.

Best regards,
Jake

Jake
Community Specialist
Community Specialist

Hey there,

 

I wanted to check in, and let you know that I will be locking the thread in 24 hours.

 

Best regards,

Jake