Description
Lennox 25J26 Auto Reset Limit Switch
The Lennox 25J26 is a precision-engineered automatic reset limit switch designed to protect furnace heat exchangers and related heating equipment from dangerous overtemperature conditions. With a trip point of 175°F and an automatic reset point of 145°F, this switch reliably interrupts the burner circuit when temperatures exceed safe operating limits, then automatically restores operation once temperatures return to the safe range — minimizing downtime and service calls.
Key Features
- Auto reset operation — automatically resets when temperature drops back to 145°F
- Trip temperature: 175°F
- Reset temperature: 145°F
- Direct OEM replacement for compatible Lennox furnace models
- Protects heat exchangers from overheating damage
- Reliable bimetal sensing element for consistent, repeatable performance
- Designed for residential and light commercial furnace applications
Application
The 25J26 limit switch is a genuine Lennox OEM replacement part intended for use in Lennox furnaces and air handlers where overtemperature protection is required. It interrupts the burner or heating circuit when the sensed temperature reaches the set point, preventing heat exchanger damage, nuisance lockouts, and potential safety hazards. The automatic reset feature eliminates the need for manual intervention once the root cause of overheating has been corrected.
Specifications
- Brand: Lennox
- Part Number: 25J26
- Switch Type: Auto Reset Limit Switch
- Trip Temperature: 175°F
- Reset Temperature: 145°F
- Application: Furnace / Air Handler Overtemperature Protection
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