OEM replacement 6-position rotary selector switch for Coleman Mach 67 Series, 8330, and 7330 Series ceiling assemblies. Two-speed control covering Off, Low Heat, Low Fan, High Fan, Low Cool, and High Cool.
The Coleman Mach 6759-3251 is the OEM replacement rotary selector switch for 67 Series (67XXX), 8330, and 7330 Series ceiling assemblies equipped with manual on-unit controls. On older Coleman Mach ceiling assemblies without a wall thermostat, the rotary selector switch is the primary user control — it selects the operating mode and fan speed directly at the ceiling assembly. All AC functions are routed through this switch, making it essential to reliable system operation.
The switch offers six positions covering the full range of manual control: Off, Low Heat, Low Fan, High Fan, Low Cool, and High Cool. This two-speed design allows the occupant to choose between low and high fan speeds in both cooling and heating modes, or run the fan independently without engaging the compressor or heat strip. A failed switch — whether from a broken stem, worn contacts, or internal failure — can cause the system to be stuck in one mode, fail to switch modes, or become completely inoperable.
The 6759-3251 also serves as a direct replacement for the discontinued CM67993251 and CM6798A3251 switch part numbers, consolidating multiple legacy switch variants into a single current replacement. The switch body includes numbered terminals, which aid in correct wire reconnection during installation.
Off → Low Heat → Low Fan → High Fan → Low Cool → High Cool — the complete manual control range for compatible ceiling assemblies
Selects between low and high fan speed in both cooling and heating modes, plus fan-only operation at low and high speed
Direct replacement for discontinued CM67993251 and CM6798A3251 switch variants — one current part number covers multiple legacy applications
Backed by a 90-day limited manufacturer's warranty
The 6759-3251 rotates through six positions in sequence: 1 — Off: System fully off 2 — Low Heat: Heat strip energized, blower on low speed 3 — Low Fan: Blower on low speed only; no compressor or heat strip 4 — High Fan: Blower on high speed only; no compressor or heat strip 5 — Low Cool: Compressor on, blower on low speed 6 — High Cool: Compressor on, blower on high speed
Before removing the old switch, record the color and position of each wire connected to the existing switch terminals. The replacement switch body has numbered terminal markings that correspond to the original wiring positions — use these numbers along with your wire position notes to reconnect each wire correctly. Disconnect power to the AC unit before beginning any switch replacement work.
The 6759-3251 is designed for 67 Series, 8330, and 7330 Series ceiling assemblies only. The equivalent rotary selector switch for 9000 Series ceiling assemblies (9330, 9370, 9430, 9470, 9530) is the 9330-3251 — a separate and non-interchangeable part. Verify your ceiling assembly model series before ordering.
Coleman Mach rotary selector switches are series-specific and are not interchangeable between ceiling assembly generations. This table summarizes the available switch options to help identify the correct replacement for your unit.