Thermostat wire colors typically correspond to specific functions in an HVAC system. Here’s a breakdown of common thermostat wire colors and their functions: 1. Red (R): Power from the transformer (usually 24V AC). 2. White (W): Controls the heating system. 3. Yellow (Y): Controls the air conditioning system. 4. Green (G): Controls the fan. 5. Blue or Black (C): Common wire (used for completing the circuit and powering smart thermostats). Additional wires may exist in more complex systems, but these are the most standard.
I replaced my common wire (blue) with the existing green (fan) because on my zone there is no fan control but the wire was there. It sounds like you have no complete circuit on the white (heat) but you do on the fan.
My system has the ac controlled in a different zone. My setup on my main floor, where this is, uses the same wire configuration: white for heat, red for power, and there’s an extra green wire for the fan. This connects to nothing. I took the green wire and used this as the common wire (typically blue) which provides constant 24v to power the touchpad. I used a voltmeter to find the hot and put the green wire on this, and then put it into the common/blue spot on the touchpad.
Your thermostat will be connected to your 120v system with a unit that converts the voltage to 24. The splice went from the hot to the green wire as described in my other comment here.
I have a electric dual,heat and air,the fans come on for heat,no heat comes out HELP????
What are the wire colors of your original thermostat?
Thermostat wire colors typically correspond to specific functions in an HVAC system. Here’s a breakdown of common thermostat wire colors and their functions:
1. Red (R): Power from the transformer (usually 24V AC).
2. White (W): Controls the heating system.
3. Yellow (Y): Controls the air conditioning system.
4. Green (G): Controls the fan.
5. Blue or Black (C): Common wire (used for completing the circuit and powering smart thermostats).
Additional wires may exist in more complex systems, but these are the most standard.
I replaced my common wire (blue) with the existing green (fan) because on my zone there is no fan control but the wire was there. It sounds like you have no complete circuit on the white (heat) but you do on the fan.
Thank you so much.been trying to get my heat back. I'm praying this works.
You lost me at the splices… 😥
My system has the ac controlled in a different zone. My setup on my main floor, where this is, uses the same wire configuration: white for heat, red for power, and there’s an extra green wire for the fan. This connects to nothing.
I took the green wire and used this as the common wire (typically blue) which provides constant 24v to power the touchpad. I used a voltmeter to find the hot and put the green wire on this, and then put it into the common/blue spot on the touchpad.
Your thermostat will be connected to your 120v system with a unit that converts the voltage to 24. The splice went from the hot to the green wire as described in my other comment here.
HELP
How did you make out?