Westinghouse 626449R Furnace Limit Switch 225-250 Auto Reset

Product Description

The WESTINGHOUSE 626449R is an over-temperature limit switch designed for use in gas furnace applications. This auto-reset limit switch monitors heat exchanger temperatures and interrupts the burner circuit when a preset high-temperature threshold is reached, protecting the furnace and surrounding structure from heat damage. It features a 3-inch insert length and is rated for 225 to 250 volt operation. Licensed HVAC technicians install this component as part of routine furnace servicing or when diagnosing nuisance shutdowns and overheat faults in upflow and horizontal furnace configurations.

This limit switch is specified for G6RA and G6RK upflow and horizontal furnace models. It suits residential forced-air gas furnace installations where over-temperature protection is required on the heat exchanger plenum or vestibule panel. The auto-reset function allows the switch to restore operation once temperatures return to a safe range, reducing the need for manual intervention after a fault condition clears. This makes it appropriate for installations where intermittent high-limit trips are being diagnosed before a root cause is identified.

Key Features

• Over-temperature limit switch with auto-reset function
• 3-inch insert length for standard furnace plenum mounting
• Rated 225 to 250 volts for compatibility with residential furnace control circuits
• Designed for upflow and horizontal furnace orientations
• Interrupts burner circuit on high-temperature fault to protect heat exchanger and system components

Compatibility

Designed for use on G6RA and G6RK upflow and horizontal furnace models as specified by the manufacturer.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect power to the furnace at the disconnect switch or breaker and turn off the gas supply before removing or replacing any limit switch. Verify the insert length and temperature rating match the original component before installation. Consult the furnace manufacturer wiring diagram and applicable local codes when reconnecting control circuit wiring.

Technical Specifications

• Type: Over-Temperature Limit Switch
• Reset Type: Auto Reset
• Voltage Rating: 225-250 volts
• Insert Length: 3 inches
• Application: Upflow and Horizontal Furnace

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 626449R