Ferguson Enterprises 10123533 Manual Reset Limit Switch

Product Description

The FERGUSON ENTERPRISES 10123533 is a manual reset limit switch used in gas heating systems to protect against overtemperature conditions. When the system exceeds a safe operating temperature, the switch opens and interrupts the control circuit, shutting down the burner. Unlike auto-reset limits, this switch requires a manual reset after tripping, which signals the technician that an underlying fault caused the event and must be diagnosed before the system is returned to service. Licensed HVAC technicians typically install and service this component as part of routine limit switch replacement or heat exchanger inspection workflows.

Manual reset limit switches are commonly found in residential and light commercial gas furnaces, rooftop units, and air handlers where a latching safety action is required. The switch is typically mounted on or near the heat exchanger or plenum area and wired into the low-voltage or line-voltage control circuit depending on the furnace design. When a nuisance trip occurs, the technician should investigate root causes such as restricted airflow, a dirty filter, or a failing inducer before resetting the switch.

Key Features

• Manual reset design requires deliberate technician action before the system restarts after a high-limit event
• Functions as a safety device that interrupts the control circuit on overtemperature
• Genuine OEM replacement part supplied in original factory packaging
• Direct replacement intended to restore original equipment safety performance

Compatibility

Designed as an OEM-style replacement manual reset limit switch for gas furnace and heating system applications. No specific compatible model numbers were provided in the available product data.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with applicable local codes and the equipment manufacturer service documentation. Disconnect all power to the unit and shut off the gas supply before beginning any service work on the limit switch or surrounding components. After installation, verify correct wiring connections and confirm the switch resets properly before returning the system to operation. Always investigate the root cause of any prior overtemperature trip before resetting the switch and restoring heat.

Technical Specifications

• Product Type: Manual Reset Limit Switch
• Condition: Brand New

Standard Information

• Brand: FERGUSON ENTERPRISES
• Manufacturer Part Number: 10123533