The Lennox 79J73 Control Limit is a genuine OEM replacement component engineered to maintain safe operating temperatures within Lennox heating systems. Designed as a direct-fit solution, this control limit helps protect your furnace or air handler from overheating conditions by shutting down burner operation when temperatures exceed the designed threshold — then automatically or manually resetting once safe conditions are restored.
Key Features
- Genuine Lennox OEM replacement part (SKU: 79J73)
- Designed for direct-fit installation in compatible Lennox heating systems
- Provides high-limit protection to prevent equipment overheating
- Helps extend system life by safeguarding heat exchangers and internal components
- Supports reliable, consistent furnace operation and occupant safety
Why Choose OEM Replacement Parts?
Using genuine Lennox OEM components like the 79J73 ensures compatibility and performance that aftermarket alternatives may not deliver. Proper limit control function is critical to the safe operation of any forced-air heating system — protecting the heat exchanger, reducing the risk of nuisance shutdowns, and helping maintain manufacturer warranty compliance.
Application
- Compatible with select Lennox furnaces and heating equipment
- Intended for installation by qualified HVAC technicians
- Verify compatibility with your specific Lennox model before ordering
For questions about compatibility or availability, contact the Jackson Systems team — your trusted HVAC supply source.
