The Coleman Mach Cool Only 8430-3861 AC Control Box is a reliable and easy-to-use control box for your air conditioner. This control box can only be used in non-ducted and ducted applications where electric heat elements are not installed.• For Coleman Mach 8330/8430/7330 Model AC Ceilling Assemblies• Replaces previous part numbers 8430-3851 and 8330-3851• 2-year limited warranty Can ONLY be used in applications where electric heat elements are not installed For Coleman Mach 8330/8430/7330 Model AC Ceiling Assemblies Replaces previous part numbers 8430-3851 & 8330-3851 | Coleman Mach Cool Only AC Control Box for 8330/8430/7330 Model Ceiling Assemblies