how can you tell if the capacitor and the contractor are good or bad? Is there a n instrument i can use to test it ?

Hello everyone, I'm trying to replace my thermostat with a newfangled programmable one. The current thermostat is from the original company, Payne. On the thermostat it says that it is a heat pump, as well as having emergency heat. I chose to get the Honeywell rth7000 series. The problem is the letters don't quite match up. On the original Payne thermostat I had wires connected to: C, G, O, R, Y, W1, W2, T (Connected from C through a resistor), and E. Now, on the new Honeywell thermostat I have places for: C, G, O/B, R, Y, Aux, E, RC, L Per the instructions, I hooked it up as such: Payne - Honeywell ----------------- R - R - RC (Jumper from R) O - O/B Y - Y G - G E - E W1 - Aux C - C Which leaves W2 as the only leftover. I capped this one off and left it disconnected. Now, I put everything back together and it is working, however, the Air Conditional will only cool off to about 82 degrees and before, it would cool off as much as I asked. I'm thinking that the W2, needs to be connected, but I'm not sure what all these letters mean and where I would connect it to. Any suggestions? Thanks in advance.