Description
Lennox 49L03 Auto Limit Switch Overview
The Lennox 49L03 is an automatic limit switch designed to provide reliable overheat protection in Lennox furnaces and heating systems. Featuring a 170–200°F operating range and a 7″ insert, this limit switch automatically shuts down the burner when temperatures exceed safe thresholds — and automatically resets once temperatures return to normal operating levels.
Key Features
- Auto-reset limit switch for automatic recovery after a high-temperature event
- Operating temperature range: 170–200°F
- 7″ insert length for proper fit in compatible Lennox furnace applications
- Designed as a direct OEM replacement for Lennox heating systems
- Protects heat exchangers and system components from damaging overheating
Application
The 49L03 limit switch is a genuine Lennox OEM replacement part intended for use in compatible Lennox furnaces. It monitors supply air or heat exchanger temperatures and interrupts the burner circuit when temperatures rise beyond the set point, safeguarding the system and occupants. Always verify compatibility with your specific Lennox model before installation.
Specifications
- Brand: Lennox
- Part Number: 49L03
- Type: Auto Limit Switch (Auto-Reset)
- Temperature Range: 170–200°F
- Insert Length: 7″
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