- New
7330A3231 (Coleman-Mach) is a replacement freeze control sensor designed for compatible recreational vehicle air conditioners. It monitors evaporator coil temperature to help prevent ice buildup that can interfere with cooling performance. The sensor comes with wiring and connectors for installation in compatible Coleman-Mach ceiling assemblies. It fits specified models in the 6797, 6799, 7330, 8330, 8530, 9330 and 9530 series. Verify your air conditioner model and existing part number before ordering.