Westinghouse 626423R Limit Switch 170F Auto Reset Hvac R

Product Description

The WESTINGHOUSE 626423R is a limit switch designed for use in HVAC and refrigeration systems. Limit switches serve as thermal safety devices, interrupting the circuit when temperatures exceed a set threshold to protect heat exchangers, motors, and other components from damage. This unit carries a 170 degrees F limit setting with auto-reset functionality, meaning the switch restores the circuit automatically once temperatures drop back to a safe range. The 3-inch insert configuration allows for installation into standard furnace plenum or duct openings. It is installed by licensed HVAC technicians as part of routine service or system repair work.

This limit switch is suited for residential and light commercial HVAC and refrigeration applications where temperature-activated safety cutoff is required. The auto-reset design eliminates the need for manual reset between trips, making it appropriate for systems that experience intermittent high-temperature conditions. The 3-inch insert form factor fits common mounting configurations found in gas furnaces, air handlers, and similar forced-air equipment. Installation is performed by qualified HVAC service professionals during scheduled maintenance or component replacement.

Key Features

• 170 degrees F limit setting for thermal overheat protection
• Auto-reset operation restores circuit automatically after cooldown
• 3-inch insert configuration for standard plenum and duct mounting
• Listed to UL applicable standards
• Suitable for HVAC and refrigeration system applications

Compatibility

Designed as an OEM-style replacement limit switch for residential and light commercial HVAC and refrigeration systems requiring a 170 degrees F auto-reset device with a 3-inch insert mount.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect and lock out electrical power to the unit before removing or installing a limit switch. Ensure the insert is fully seated and secure in the mounting opening before restoring power. Refer to the equipment manufacturer's wiring diagram and applicable local codes for proper circuit integration.

Technical Specifications

• Item Type: Limit Switch
• Limit Setting: 170 degrees F
• Reset Type: Auto Reset
• Insert Length: 3 inches
• Application: HVAC/R
• Listing Standard: UL

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 626423R