Description
The Lennox 15M45 is a manual reset rollout switch engineered to protect furnaces and heating systems from the hazards of flame rollout. When burner flames extend beyond their intended path — a condition that can result from heat exchanger failure, blocked flue passages, or improper combustion — this switch detects the elevated temperature and immediately interrupts the circuit to shut down the burner, preventing equipment damage and potential fire hazards.
Key Features
- Trip temperature: 200°F — precisely calibrated to detect abnormal flame rollout conditions
- Manual reset operation — requires deliberate technician intervention before the system can restart, ensuring the root cause is identified and corrected
- SPST (Single Pole, Single Throw) configuration — provides a clean, reliable circuit interruption
- Direct OEM replacement for compatible Lennox furnace models
- Compact, durable construction designed for long-term reliability in demanding heating environments
Why Manual Reset Matters
Unlike automatic-reset limit switches, a manual reset rollout switch prevents the system from cycling back on after a fault condition. This design philosophy prioritizes safety — a technician must physically inspect the unit, diagnose the underlying cause of rollout, and manually reset the switch before operation resumes. This safeguard helps prevent repeated exposure to dangerous flame rollout events.
Application
- Designed for use in Lennox furnaces and heating systems requiring a 200°F rollout protection switch
- Ideal for HVAC technicians performing OEM-spec repairs and replacements
- Compatible with systems requiring SPST rollout switch protection
Specifications
- Brand: Lennox
- Part Number: 15M45
- Trip Temperature: 200°F
- Reset Type: Manual Reset
- Switch Type: SPST (Single Pole, Single Throw)
- Function: Rollout Switch / Flame Rollout Protection
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