OEM Lennox Limit Switch — 28G45
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The genuine OEM Lennox 28G45 limit switch is a temperature-sensitive safety control that protects your furnace from overheating. Positioned to sense heat exchanger temperature, it automatically interrupts the burner circuit when temperatures climb above the safe limit and closes again once conditions return to normal, safeguarding both the equipment and your home.
When this switch begins to fail, you may experience a furnace that short-cycles, trips off during a heating call, or fails to fire at all. Nuisance trips are frequently triggered by dirty filters, closed registers, or weak blower airflow, while a defective switch can open prematurely or stick, leaving the furnace inoperable or unprotected.
Selecting the OEM Lennox 28G45 guarantees the precise trip and reset temperatures your furnace was engineered to use. Substitute switches with incorrect setpoints can defeat this important safety function or cause frustrating cycling issues. A factory-matched limit switch restores dependable, safe operation to your Lennox heating system.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days