I am installing a Honeywell, RTH230B.

My connections are:
R to Rh (red jumper to Rc that came with the unit)
W to W
Y to Y
G to G
B to nothing

The fan comes on (when set to "on").

When set to auto (and program the temperature way up or way down), the heating/cooling/fan do not respond.

I have tried the J2 Jumper at both settings, just in case, with no change.

Is the unit bad or am I doing something wrong?

elbee

I wrote to Honeywell about the problem, and am posting their response:

Based on the information you have provided, the RTH230B is wired correctly. Please make sure the J2 jumper is set to the HG position (default position). If the heating does not come on, please follow the steps given below:



· Put the system switch to heat and the fan switch to auto.

· Make sure the heating set point is higher then the room temperature.

· The thermostat will make a call for heat indicated by the flame icon in the display. When the flame icon appears in the display, the heating should come on.

· The wires connected to the thermostat should be tight and secure.

· The furnace door should be tightly shut.

· Make sure the power switch at the heating equipment is on. Reset the circuit breakers.



If the flame icon in the display is steady, it is advisable to have the voltage going into the thermostat checked through a licensed HVAC contractor. The RTH230B needs a steady voltage of 24 to 30 VAC to operate.