The Lennox 12P55 (part number 102857-09) is a factory-original control-limit switch designed to provide primary over-temperature protection in gas furnaces. Rated for 190°F, this main limit switch automatically interrupts burner operation if internal temperatures exceed safe thresholds, helping to prevent damage to heat exchangers and critical components. Ideal for Lennox systems, it ensures reliable safety and thermal regulation in demanding HVAC applications.Specifications:
- Temperature Rating: 190°F (Main Limit)
- Voltage Rating: 24V AC
- Electrical Rating: 7.4A resistive, 3.7A inductive
- Reset Type: Manual or automatic (application dependent)
- Mounting: Surface mount with two-hole bracket
- Sensor Type: Bimetal disc
- Application: Primary high-limit temperature protection in Lennox furnaces
- Operating Environment: -40°F to 190°F
- OEM Part: Lennox original component for guaranteed fit and function