The Nordyne 626458R is a genuine OEM L190‑50F 2‑pole limit switch designed to protect electric furnaces and air handlers from overheating. This automatic‑reset safety switch opens when temperatures reach 190°F and resets after the temperature drops by 50°F, helping prevent damage to heating elements, wiring, and internal components.

The double‑pole design allows the switch to interrupt multiple circuits simultaneously, making it ideal for higher‑capacity electric furnace applications. Built to Nordyne factory specifications, the 626458R provides reliable temperature protection and maintains safe operation in Nordyne, Intertherm, Miller, and related manufactured‑housing HVAC equipment.

Direct OEM

• 626458R — Nordyne L190‑50F 2‑Pole Limit Switch

Compatible Brands

• Nordyne
• Intertherm
• Miller
• Broan
• Frigidaire
• Maytag
• Tappan
• Gibson

Related Limit Switches (Different Temperature Ratings)

• 626337R — L170‑40F Limit Switch
• 626325R — L160‑40F Limit Switch
• 626181R — L150‑40F Limit Switch
• 632444R — L210‑50F Limit Switch

Technician Notes

• Temperature Rating: L190‑50F
• Open Temperature: 190°F
• Reset Differential: 50°F
• Reset Type: Automatic
• Configuration: Double Pole (2‑Pole)
• Application: Electric furnace high‑limit protection
• Function: Opens on temperature rise to prevent overheating
• Always inspect heating elements, sequencing relays, blower motors, and airflow restrictions when replacing a limit switch.
• Repeated limit failures typically indicate an airflow or electrical issue rather than a defective switch.

Common Symptoms of Failure

• Furnace heating elements not energizing
• Intermittent heating
• Furnace shuts down on high limit
• Blower operates but no heat
• Open limit fault conditions