Nordyne 626459R L190-50F Furnace High-Limit Switch

Description

Nordyne 626459R L190-50F Furnace High-Limit Switch Overview

The Nordyne 626459R is an OEM replacement high-limit switch designed to protect furnaces from overheating conditions. Identified by the L190-50F designation, this limit switch opens the circuit at 190°F and resets (closes) at 140°F — a 50°F differential — providing reliable, automatic thermal protection for the heat exchanger and blower system.

Key Features

• OEM Nordyne replacement part — ensures proper fit and function
• Opens (trips) at 190°F to shut down burner operation during overheating
• 50°F differential — automatically resets at 140°F once the furnace cools
• Protects heat exchanger, blower assembly, and downstream components from heat damage
• Direct drop-in replacement for compatible Nordyne, Miller, Frigidaire, and affiliated brand furnaces
• Durable construction for long service life in residential heating applications

Specifications

• SKU: 626459R
• Model: L190-50F
• Brand: Nordyne
• Trip Temperature: 190°F (opens)
• Reset Temperature: 140°F (closes)
• Differential: 50°F
• Type: High-Limit Safety Switch
• Application: Residential Gas Furnace

Application

This limit switch is a critical safety component in gas furnaces. When airflow is restricted or the blower fails, temperatures inside the furnace can rise to dangerous levels. The L190-50F limit switch automatically interrupts the burner circuit at 190°F, preventing damage to the heat exchanger and potential safety hazards. Once the furnace cools to 140°F, the switch resets and normal operation can resume. Always verify compatibility with your specific Nordyne model before installation.