I just had an American Standard Platinum ZM a/c unit installed with the color touch screen thermostats. During my kitchen remodel, one of the workers smashed the touch screen. It's taking my a/c installer FOREVER to get me a replacement. Today it's 105º and I'd like to turn my a/c on!

He told me that until he can get it to me, I can hook up my old thermostat. I tried and it blew the fuse in the a/c unit.

In the touch screen I just have three terminals labeled D, R, B. They had white to D, Red to R and Green to B.

The a/c guy told me to hook up these wires to my old thermostat: R to Red, y to yellow, C to blue, W to white and G to green.

But at the AC unit, I have two sets of wires going to three terminals. From the thermostat is white to D, R to Red and green to B/C.

Then a black wire comes in from somewhere else split to D and B, and another wire with Green to B/C and White to D.

He told me to leave the wires alone at the AC, but when I hooked up the old thermostat and turned the AC on, it blew the fuse and sparked. So clearly something is wrong.

Can someone please help before we burn up?

Have the contractor pay for repairs.