Product Overview:
The Fyizo FYZ-01-RL59 is an OEM-quality roll-out limit switch designed as a direct replacement for the Lennox 12F19. This safety component monitors furnace temperature and shuts down the system if overheating occurs, protecting the unit from damage and ensuring safe operation. It’s ideal for HVAC technicians and homeowners looking for a dependable replacement that meets Lennox factory specifications.

Key Features and Benefits:
This limit switch matches the original Lennox 12F19 in design and performance, making installation fast and simple. It provides reliable temperature control and safety shutoff to prevent heat exchanger damage. The durable materials withstand repeated heating cycles and harsh conditions. Each part is factory tested to guarantee consistent operation and compliance with OEM standards. Designed for easy replacement using existing mounting and wiring connections.

Specifications:
Brand: Fyizo
Part Number: FYZ-01-RL59
Replaces: Lennox 12F19
Type: Roll-Out Limit Switch
Temperature Rating: 300°F Manual Reset
Application: Gas furnaces, HVAC safety systems

Weight and Dimensions:
Weight: 0.15 lb
Length: 2.5 in
Width: 0.5 in
Height: 0.5 in

Additional Information:
The Fyizo FYZ-01-RL59 provides the same protection and reliability as the original Lennox 12F19 roll-out limit switch. It helps prevent unsafe operating conditions, supports furnace safety compliance, and ensures continued performance in residential and commercial systems.

Using Fyizo OEM replacement components helps extend furnace lifespan, improve operational safety, and maintain manufacturer-grade performance. Built for high durability and easy installation, this switch delivers long-term dependability and peace of mind during every heating season.