Westinghouse 626461R Furnace Fan Limit Switch 160F

Product Description

The WESTINGHOUSE 626461R is a manual-reset fan limit switch designed for residential and light-commercial gas furnaces. It monitors supply-air temperature in the furnace plenum and controls the blower motor based on preset temperature thresholds. When supply-air temperature exceeds the rated limit of 160 degrees F, the switch trips and cuts power to the burner circuit, protecting the heat exchanger from overheating. Because it is a manual-reset type, the switch must be physically reset after a limit trip, making it a reliable safety indicator that draws technician attention to the underlying cause of the overtemperature event.

This fan limit switch is used in forced-air gas furnace applications where plenum-mounted temperature sensing is required. It is suited for residential furnace installations where a manual-reset safety limit device is specified by the original equipment design or a replacement upgrade is needed. HVAC technicians typically encounter this component during seasonal inspections, heat exchanger integrity checks, and service calls involving nuisance limit trips or failed limit switches.

Key Features

• Manual-reset design requires deliberate technician action after a limit trip, preventing automatic restart into a fault condition
• 160 degrees F limit rating provides plenum overheat protection for the heat exchanger and connected ductwork
• Fan limit switch function integrates blower control and high-limit safety in a single device
• Designed for furnace plenum or bonnet mounting in forced-air heating systems

Compatibility

Designed as an OEM-style replacement for furnace fan limit switches in residential forced-air gas furnace systems requiring a manual-reset, 160 degrees F rated limit control.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with the furnace manufacturer instructions and applicable local mechanical codes. Disconnect all power to the furnace and shut off the gas supply before removing the existing limit switch. Verify the replacement switch mounting configuration and electrical terminal connections match the original before energizing the system. After installation, do not bypass the manual-reset function — a tripped limit should always be investigated for root cause before the switch is reset and the furnace is returned to service.

Technical Specifications

• Type: Fan Limit Switch
• Reset Type: Manual Reset
• Limit Temperature: 160 degrees F
• Used On: Furnace

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 626461R