Wiring problem with my thermostat?

Question

Ok, so i had to rewire my thermostat from heat back to air.  Since one fried out last year, it only left me with one thermostat.  So now i jus switch it back and forth.

Ok, so i rewired it, the air handler came on fine which i later determined to only be the fan running, but my air conditioner didn't start up at all.

I'm figuring i have a wiring issue considering i haven't done this since last year.

The wires from the wall are.
Green, Red, Blue, White, and a Black one used as a jumper.

The parts on my thermostat to connect to are
G, Y, W, RH, B, O, RC

Now i had the green to G
Y empty
W to the white
Red on RH
Blue on B
O empty
and the black jumper was from RC to RH

Is this wired correctly?  I'm also considering the air conditioner is old and therefore may be an issue with it.

Any help is greatly appreciated.  Its midnight here, so i'm off to bed, hopefully by morning someone will have a solution for me to attempt.

Brandon · Accepted Answer

There has to be a wire for cooling which would connect to the Y on the T-stat. If you do not have a wire connected to the Y on the Tstat then your unit will never call for cooling which means you A/C will not turn on. Go to your furnace and see what color wire is connected on your furnace control board to the Y terminal. Hook up that same wire to the Y on the Tstat. I feel that is where your error is. G + Air handler, Y = Cooling, W = neutral, RC= power. You should not need to worry about hooking anything up to B or O. Hope this helps.

? · Answer

Take the blue wire off the B terminal and move it to the Y terminal. you should be okay as long as you are using a battery powered thermostat that does not need a common feed.

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Wiring problem with my thermostat?

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