I recently purchased a house and it has a Carrier Infinity 96 furnace. I cant afford to purchase the infinity control thermostat, so I bought a honeywell 7 day thermostat. I am trying to install the thermostat by myself and have run into some problems. In the instructions for the honeywell it says if wires were hooked to W1, Y1, and W2 some system modification is required. Call your local heating and cooling contractor for assistance. I would call my local hvac guy but its the weekend, can anyone help?