ryant
Sep 23, 2007, 06:21 AM
Hi everyone. I currently have a hunter thermostat that's digital but am replacing it with a newer honeywell rth5100b. Here's my question:
The old thermostat has the standard 4 R G W Y terminals with their respective wires connected to them. However, there is a 5th wire ( blue in this case) connected along with the red to the R terminal. When looking at the wiring at the fan control, it appears that the blue wire is connected to the left most TH terminal on the gas valve and to nothing else. All other wiring seems to match up, its just this blue wire.
Should I just match the old thermostat with respect to the wiring?
The old thermostat has the standard 4 R G W Y terminals with their respective wires connected to them. However, there is a 5th wire ( blue in this case) connected along with the red to the R terminal. When looking at the wiring at the fan control, it appears that the blue wire is connected to the left most TH terminal on the gas valve and to nothing else. All other wiring seems to match up, its just this blue wire.
Should I just match the old thermostat with respect to the wiring?