Westinghouse 626598 Main Air Limit 130-160F Auto Reset

Product Description

The WESTINGHOUSE 626598 is a main air limit control with an auto-reset function, designed for use in condensing gas furnace systems. This component monitors supply-air temperature and interrupts burner operation when the sensed temperature exceeds the set threshold, preventing heat exchanger damage and protecting downstream components. The 626598 operates across a limit range of 130 to 160 degrees F and resets automatically once the airflow condition clears and temperature returns to a safe level. Licensed HVAC technicians typically handle replacement of this safety control during routine furnace service or diagnostic calls.

This main air limit control is specified for condensing gas furnace applications where high-efficiency heat exchange and tight air-temperature control are required. The auto-reset design reduces manual intervention after a nuisance trip caused by a transient airflow restriction. It is appropriate for residential and light-commercial gas furnace systems where this style of temperature-actuated limit device is specified by the original equipment manufacturer.

Key Features

• Auto-reset function restores operation automatically after the over-temperature condition clears
• Limit range of 130 to 160 degrees F provides accurate supply-air temperature protection
• OEM-style replacement for condensing gas furnace main air limit position
• Interrupts burner circuit on over-temperature event to protect heat exchanger integrity

Compatibility

Specified for use on the 102E-45D Condensing Gas Furnace per manufacturer documentation.

Installation Notes

Installation should be performed by a licensed HVAC technician following applicable local mechanical codes and the furnace manufacturer service manual. Disconnect electrical power and shut off the gas supply to the furnace before removing the existing limit control. Verify the replacement limit is seated firmly against the heat exchanger plenum surface and that all wiring terminals are fully engaged before restoring power. After installation, cycle the furnace and confirm the limit does not trip under normal airflow conditions before returning the system to service.

Technical Specifications

• Type: Main Air Limit
• Reset Type: Auto Reset
• Limit Range: 130 to 160 degrees F
• Application: Condensing Gas Furnace

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 626598