I've seen lots of questions here about this and the answers were somewhat useful, but I can't get my new RTH230B thermostat to work.

My furnace has W,Y,R,G wires going to the thermostat. All were colored correctly, except for the R connection which has a Blue wire. The thermostat has a RH, RC, W, Y, G connections.

I wired the W to W, the Y to Y, the G to G and the R (blue wire) to the RH which is also jumpered to RC.

As of now, the fan comes on but I can't get the heat on.

Per a previous post, I have just put new batteries in it also. :)

Any help is great appreciated.

Thanks,

GW

You say the fan is running all the time? And all you did was change t-stats? No problems pryor to that?

When you turn it to ac does the outdoor unit come on?

Double check to make sure thermostat wiring is connect at furnace the same as it is at stat..

Check to see if the instructions mention hitting a reset button on the stat after changing the batteries.