370C - EXCAVATOR 1830 HEATING AND AIR CONDITIONING Parts group 1830 HEATING AND AIR CONDITIONING 1830 HEATING AND AIR CONDITIONING . HEATER / AIR CONDITIONER AIR CONDITIONER AIR CONDITIONER AIR CONDITIONER COMPONENTS AIR CONDITIONER AND HEATER COMPONENTS AIR CONDITIONER AND HEATER COMPONENTS (CONTINUED) HEATER LINES HVAC DUCT WORK AND FILTER COVER (12V POWER SUPPLY) DEFROSTER / AIR CIRCULATION FAN