8430-3861

Cool-only J-Box

MACH 15, MACH 3+, MACH 1

Analog wall thermostat; no heat pump

8530-5091

Heat pump control box

MACH HP2, MACH 15 HP

Supports reversing valve logic

8330-3851

Legacy cool-only control box

Older MACH 1, MACH 3

Predecessor to 8430-3861

9430A751

Digital control box

MACH 8, MACH 10

Pairs with digital thermostats like 7330G3351

9330E715

Cool/Heat Ready (non-ducted)

MACH 8 ND, MACH 10 ND

For non-ducted ceiling assemblies

8330-3862

Ducted cool-only control box

MACH 3+, MACH 15

Often bundled with 7330F3852 thermostat

8430-3851

Cool-only ceiling assembly

MACH 1, MACH 3

Includes PC board; ceiling mount variant

🛠️ Technician Tips

• Analog thermostats typically use 3–4 wires and pair with J-box control assemblies like 8430-3861.
• Digital thermostats require control boxes like 9430A751 or 8530-5091 depending on system type.
• Always verify rooftop unit model and control box before selecting a thermostat.
• Some thermostats are discontinued (e.g., 7330G3351 is listed as NLA)—consider stocking alternatives or refurbished units.