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kdclemson
May 5, 2009, 05:17 PM
I need help with wiring my new Honeywell RTH 6400 Thermostat.

The old honeywell had the following colors and connections:
E: brown wire
AUX: white wire
Y: yellow
G: Green
O: Orange
R: Red
C: Blue
L: Brown

Extra unused black wire.

The new system calls for:
G
W
Y
R
Rc

We used Green, Orange, yellow, and Red since there was a jumper between the Red and Rc but it's only blowing out hot air. PLEASE HELP! IT's HOT IN SC!!

Joshdta
May 6, 2009, 01:35 PM
I take it you have a heatpump? You need a different t-sta