I have an Intertherm FEH-010HA-03 heater in my mobile home. It is a central heat/ac unit with a heat/cool switch on the heater. I need to replace the thermostat in the livingroom and it is a 2 wire thermostat. Is there a way to wire this system to a new Honeywell 7-Day Programmable Thermostat - RTH7600D, without using the heat/cool switch on the heater?