Westinghouse 626508R Furnace Limit Switch 210 250 Degrees F

Product Description

The WESTINGHOUSE 626508R is a furnace limit switch rated to open at 210 degrees F and close at 250 degrees F. Limit switches are thermal safety controls that interrupt the burner circuit or blower operation when the heat exchanger reaches an unsafe temperature, protecting the furnace and the structure from overheating. This is a single-speed model with a 0.5 inch diameter mounting profile. It is installed by licensed HVAC technicians during routine maintenance, component replacement, or safety system restoration on gas and oil-fired forced-air furnaces.

This limit switch is suited for residential forced-air furnace applications where a 210 degrees F open and 250 degrees F close thermal cutout is required. The 0.5 inch diameter form factor fits standard limit switch mounting ports found on many furnace heat exchanger compartments. Installers typically encounter this style of limit switch when servicing equipment that has tripped or failed open due to age, repeated overtemperature events, or heat exchanger airflow restriction.

Key Features

• Opens circuit at 210 degrees F to protect against overheating
• Resets and closes at 250 degrees F for automatic recovery
• Single-speed control configuration
• 0.5 inch diameter mounting body for standard furnace limit ports
• OEM-style replacement for gas and oil-fired forced-air furnaces

Compatibility

Designed as an OEM-style replacement limit switch for residential and light commercial gas or oil-fired forced-air furnaces requiring a 210 degrees F open and 250 degrees F close thermal limit control with a 0.5 inch diameter mounting profile.

Installation Notes

Limit switch replacement is performed by a licensed HVAC technician. Always shut off power to the furnace at the disconnect or breaker and allow the heat exchanger to cool fully before handling the switch. Inspect the furnace filter and airflow path before installing a replacement limit switch, as restricted airflow is a common cause of limit switch failure. Installation should comply with applicable local mechanical codes and the furnace manufacturer service documentation.

Technical Specifications

• Component Type: Limit Switch
• Open Temperature: 210 degrees F
• Close Temperature: 250 degrees F
• Speed Configuration: 1-Speed
• Mounting Diameter: 0.5 inches
• Application: Furnace

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 626508R