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Plug in c-wire adapter

Community Member

I have a boiler with a Honeywell aquastat controller. The aquastat does not have a c-wire connector. Can I connect my Nest c-wire connector to the 2 wires (red/RH & white/W1) in the aquastat and the conector's c-wire directly to the c-wire on a 24v plug in adapter?


Community Specialist
Community Specialist

Hi mjtoncc,


Thanks for reaching out here in the Google Nest Community.


We have a complete guide on this ink on how to connect your Nest Power Connector to your system.


Let us know how it goes by replying to this thread.




Community Member

The guide does not cover an install on a furnace with no c-wire connection. I scheduled a Google Pro but the appt was cancelled at the last minute because there are no Google Pros in my area. I installed one of 3 thermostats w/o a c-wire. It is running but I don't know if it's just running off the batteries and if so, how long it will last.