Mestek j11r06778-003 Air Pressure Switch Xf Series

Product Description

The MESTEK j11r06778-003 is an air pressure switch designed as a standard alternate replacement for use in forced-air heating equipment. Air pressure switches monitor combustion air or inducer airflow and send a signal to the control board confirming safe draft conditions before allowing the burner to fire. This switch is a direct-fit alternate for specific XF Series unit configurations and is installed by licensed HVAC technicians during scheduled maintenance or fault diagnosis. It plays a critical safety role in the sequence of operation for gas-fired heating systems.

This air pressure switch is specified for MESTEK XF Series units in the 100-150 and 300-400 size ranges. It serves as a standard alternate part, meaning it is a recognized compatible substitute for the original pressure switch in those configurations. Typical installations are found in commercial or light-commercial hydronic or forced-air heating applications where XF Series equipment is deployed. Technicians should verify unit nameplate data and existing switch specifications before ordering to confirm fitment.

Key Features

• Standard alternate air pressure switch for XF Series 100-150 and 300-400 units
• Monitors inducer or combustion air pressure as part of the burner safety interlock sequence
• Direct replacement fit minimizes modification during installation
• Recognized alternate part designation ensures OEM-level compatibility for listed unit sizes

Compatibility

Specified as a standard alternate air pressure switch for MESTEK XF Series units in the 100-150 and 300-400 size ranges.

Installation Notes

Air pressure switches are serviced by licensed HVAC technicians. Shut off all power to the unit and close the gas supply valve before beginning any service work. Verify the differential pressure rating of the existing switch before installing a replacement to ensure the new switch operates within the same pressure range. Follow all applicable local mechanical codes and manufacturer service documentation during installation and startup.

Technical Specifications

• Component Type: Air Pressure Switch
• Application: XF Series 100-150, 300-400
• Part Classification: Standard Alternate

Standard Information

• Brand: MESTEK
• Manufacturer Part Number: j11r06778-003