Sunday, 31 January 2021

COMMON wire on Lennox

Hello Experts looking for help.

My HVAC setup is back from 80's and I am trying to get a unused wire in 18/5 wiring as a C/Common wire to power up Wifi thermostat.

When I look at the furnace I do not see a C terminal and rather see a "T" terminal, I am unsure if this is the C terminal.

This is Model G12 series for Lennox. Attaching diagrams and current wiring on the HVAC

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source https://hvac-talk.com/vbb/showthread.php?2226208-COMMON-wire-on-Lennox&goto=newpost

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