I have a 25+ year old York Forced Air electric furnace, want to hook up the new Honeywell WIFI stat, there is no C wire connection in the Furnace itself, and some instructions have indicated using the B terminal – which has the 24V wire from the Transformer connected to it. The confusing part of the Furnace wiring diagram shows that the R terminal is also connected to the secondary side of the transformer to what looks like the Common wire, and here's where it's confusing me, that wire is going to Ground as well? So can the B terminal be used as the C wire to the stat?
Here's the wiring diagram. There's no AC or Heat Pump, purely used for heating.
Best Answer
Based on the schematic, the
Bterminal should be able to be used as aC. Simply extend a wire fromB, and connect theCterminal of the thermostat to it. It should look something like this...Though since you said you don't have A/C hooked up, you won't have the
Ywire connected.