Description
Lennox 89W14 L175-30F High-Limit Switch Overview
The Lennox 89W14 is an OEM replacement L175-30F high-limit switch engineered to protect furnaces from dangerous overheating conditions. When supply-air temperatures exceed the rated set point, this limit switch interrupts the burner circuit, preventing heat exchanger damage and safeguarding occupants. Once temperatures return to a safe operating range, the switch automatically resets, restoring normal furnace operation.
Key Specifications
- OEM Part Number: 89W14
- Model: L175-30F
- Open (Trip) Temperature: 175°F
- Differential: 30°F (closes/resets at approximately 145°F)
- Type: Automatic-reset high-limit switch
- Application: Lennox furnaces and compatible heating equipment
Features & Benefits
- OEM-specified replacement ensures proper fit and reliable performance
- Automatic reset restores normal operation once safe temperatures are reached
- Interrupts burner circuit to prevent heat exchanger overheating and damage
- Protects equipment and occupants from excessive heat buildup
- Direct replacement for failed or degraded limit switches in Lennox systems
Application
Designed as a direct OEM replacement for Lennox furnaces, the 89W14 limit switch is a critical safety component in forced-air heating systems. It is installed in the supply-air plenum or heat exchanger area and monitors operating temperatures continuously. Technicians should always verify compatibility with the specific Lennox furnace model before installation.
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