Honeywell RTH230B Digital Thermostat Installation
I bought a Honewell RTH230B to replace and mercury base Honewell T822B thermostat.
The old thermostat had the following wires:
Blue
Red
Yellow
White
Green
I wired the new RTH230B as follows:
Red = to Rh jumper on Rh and Rc
Yellow = Y
White = W
Green = G
Blue = did not connect.
When I wired like this the system goes on but I only get hot air through the vents. There is no cold air coming out even though I have it at 65! Not sure what I am doing wrong. Any help will be appreciated.
I disconnected the new unit plugged back to the old unit and it works perfectly fine!