Programmable Thermostat, Fan runs, Heat/Air do not run in Auto setting

elbee · #1 Nov 20, 2006, 01:20 PM

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?

NorthernHeat · Nov 20, 2006, 02:46 PM

Connect R and W at the thermostat, did the furnace start?

elbee · Nov 20, 2006, 02:54 PM

Of course, you posted right after I re-connected the old one...I won't be able to try again until tomorrow afternoon. If I connect R and W, and the furnace doesn't start, what does that mean? If it does, what does that mean?

Thanks!

NorthernHeat · Nov 20, 2006, 03:07 PM

It means you have a problem most likely in the furnace. If it doesn't work by jumping them at the stat, try it on R + W @ the furnace if it then starts you have a bad stat wire. Please becarefull around electricity. Note: there should be a safty door switch on the blower compartment that must be depressed for the furnace to operate.

elbee · Nov 21, 2006, 01:19 PM

I came home to work on this, and read your post. I don't think there could be a problem with the furnace or the wires, because the old thermostat works. If I have it wired correctly, it must be the new thermostat.

My old thermostat is wired:
R-R
G-G
Y-Y
W-W
B-empty
O-empty.

There is a blue wire from the wall, which was not connected to the old and I did not connect to the new. There is not an orange wire. I posted the connections I made on the new thermostat previously.

If there's something else I could try (other than buying a new thermostat), please let me know.

NorthernHeat · Nov 21, 2006, 01:45 PM

You wired it correctly from what you have said. It is either a bad stat or the furnace has a problem. Did you try to connect r-w at the stat?

elbee · Nov 21, 2006, 01:48 PM

I haven't done that, because I know it's not the furnace. Now, however, I realize what you mean by "stat wire" (I was thinking that was a name for one of the wires, not part of the thermostat.). I'll try now.

NorthernHeat · Nov 21, 2006, 02:10 PM

Good luck

elbee · Nov 21, 2006, 02:11 PM

Okay--I get nothing. But without the green connected can the fan run at all? Or should I be looking instead of listening?

NorthernHeat · Nov 21, 2006, 02:20 PM

R to G will turn on the blower. R to W will start the heating process. R to Y will turn on the outdoor A/C. The fan is controlled by the furnace for heat, not the thermostat. The G wire does control the fan in most furnaces for A/C tho.



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