12V Wall Thermostats
Every ducted Coleman-Mach system runs from a 12V wall thermostat through a control package in the ceiling assembly, and the thermostat must match the package: analog stats with the 8330-752 and 9330C755 packages, digital zone stats with the 9430A751 and 9630A751 boxes. Park-model 24V systems use a different thermostat entirely. The full pairing chart is on Will My Thermostat Work?
