Westinghouse 626419R Furnace Limit Switch 175-195F Auto Reset

Product Description

The WESTINGHOUSE 626419R is a high-limit safety switch designed for use in gas furnace applications. It monitors heat exchanger temperature and interrupts the burner circuit when the measured temperature exceeds the upper threshold, protecting the heat exchanger and connected components from thermal damage. This limit switch features an auto-reset function, meaning it automatically restores operation once temperatures fall back within the safe range. The switch has a 3 inch insert depth and a 0.5 inch diameter sensing element. Licensed HVAC technicians performing furnace maintenance or safety-control replacement are the primary installers.

This limit switch is suited for residential and light commercial gas furnace installations where a high-limit control is required in the supply air plenum or heat exchanger compartment. It operates across a trip range of 175 to 195 degrees F and is a direct replacement for worn or failed OEM-style limit controls on forced-air gas furnaces. The auto-reset design reduces service callbacks by eliminating the need for manual reset after a transient high-temperature event, provided the underlying cause has been corrected.

Key Features

• Auto-reset operation restores furnace function after temperatures return to safe range
• 175 to 195 degrees F trip range for accurate high-limit protection
• 3 inch insert depth fits standard furnace plenum or heat exchanger mounting locations
• 0.5 inch diameter sensing element for compatibility with common limit switch knockouts
• Interrupts burner circuit on over-temperature condition to protect the heat exchanger

Compatibility

Designed as an OEM-style replacement high-limit switch for residential and light commercial gas furnace systems requiring a 175-195 degrees F auto-reset limit control with a 3 inch insert and 0.5 inch diameter sensing element.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with local codes and the furnace manufacturer's service documentation. Shut off gas supply and disconnect electrical power to the furnace before removing the existing limit switch. Verify insert depth and element diameter match the mounting port before installation. After installation, cycle the furnace and confirm proper operation before returning the unit to service.

Technical Specifications

• Type: Limit Switch
• Used On: Gas Furnace
• Trip Range: 175-195 degrees F
• Reset Type: Auto Reset
• Insert Depth: 3 inches
• Element Diameter: 0.5 inches

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 626419R