The White Rodgers 3L09-9 is a 1/2" bimetal disc board mount limit control designed for precise thermal regulation in HVAC systems and other temperature-sensitive equipment. This snap-action control opens at 190°F and automatically resets by closing at 170°F, providing dependable over-temperature protection by interrupting electrical circuits at predetermined limits.Key Specifications:
- Part Number: 3L09-9
- Open Temperature: 190°F
- Close Temperature: 170°F
- Mounting Style: Board mount
- Disc Type: Bimetal, snap-action
- Insertion Length: 3.12"
- Switch Action: Opens on temperature rise
- Reset Type: Automatic
- Application: Limit control in forced air heating systems

