Home Questions Tags Users Unanswered. Mar 4, 3, What is the yellow triangle with the 2 in it? One other thing I will add based on your comment is about the C line. The first thing to do is to switch off electrical power that connects the exhaust fan.
Sep 8, 9.
Wire an Exhaust Fan to a Thermostat
In addition, the ground wire should attach to the terminal screw in the electrical box. Sign up using Email and Password. That won't get you anywhere. In my current plan, I am NOT trying to turn the heating on - just the fan. Going from memory the green supplies the power for the fan relay obtained in the thermostat from the AC red, the green switches the fan relay in the HVAC unit that has the AC black connected to it.