Rotary Heater Control Knob - 4-Position Fan Switch
High-quality rotary control knob with an integrated 4-position switch, designed for manual control of heater blowers and ventilation systems in vehicles.
The control features four different positions, allowing you to select between three fan speeds and an OFF position. The knob is manufactured from injection-moulded ABS plastic with a soft, rubberised and textured surface for improved grip. A chrome-finished logo in the centre gives the control a classic and stylish appearance.
The switch is designed for fans and blower motors equipped with an integrated resistor pack. The supplied connector provides a secure and insulated electrical connection, even in environments subject to vibration.
Ideal for passenger cars, motorsport, kit cars and custom-built heating and ventilation systems.
Specifications:
Type: Rotary control knob with 4-position switch
Function: 4 positions (OFF + 3 fan speeds)
Application: Heater blower and ventilation fan control
Operating voltage: 12V DC up to 20A / 24V DC up to 10A
Material: Injection-moulded ABS plastic with rubberised surface
Finish: Textured surface with chrome-finished logo
Knob diameter: 25.4 mm
Knob depth: 22.9 mm
Shaft type: D-shaped
Shaft diameter: 6.35 mm
Thread size: 7/16-28
Thread length: 9.14 mm
Connector: Included
Cable terminals: 1.5–2.5 mm², included
Connection information:
Position 1: Low speed (L + H)
Position 2: OFF
Position 3: Medium speed (B + L + C)
Position 4: High speed (B + H + C)
Connection C is live in all active positions and can, for example, be used for an indicator light or to activate the A/C system only when the fan is switched on.
