Mestek j11r06780-008 Air Pressure Switch Gg Series

Product Description

The MESTEK j11r06780-008 is a standard replacement air pressure switch designed for use in gas-fired heating equipment. Air pressure switches monitor the negative pressure created by the inducer motor to verify proper venting before allowing ignition to proceed. This switch serves as a critical safety component in the combustion airflow circuit. It is typically installed or replaced by a licensed HVAC technician during routine maintenance or as part of a no-heat diagnostic call. The j11r06780-008 is listed as the standard alternate replacement for GG Series units in the 60,000 to 75,000 BTU/h range.

This air pressure switch is intended for residential gas furnace applications, specifically within the Sterling GG Series product line rated at 60,000 to 75,000 BTU/h. It fits into the low-voltage control circuit, where it signals the control board that inducer operation is confirmed before the heating sequence advances. This part is applicable in forced-air, gas-fired furnace installations where the original pressure switch has failed or is out of calibration.

Key Features

• Standard alternate replacement for GG Series 60,000 to 75,000 BTU/h furnaces
• Monitors inducer motor negative pressure to confirm safe venting conditions
• Functions as a safety interlock in the furnace ignition sequence
• Direct OEM-style replacement minimizes modification at install

Compatibility

Designed as a standard alternate replacement air pressure switch for Sterling GG Series gas furnaces in the 60,000 to 75,000 BTU/h output range.

Installation Notes

Air pressure switch replacement is performed by a licensed HVAC technician. Shut off power to the furnace at the disconnect and turn off the gas supply before beginning any service work. The inducer port tubing and electrical connector must be disconnected from the old switch before installing the new one. Verify all hose connections are secure and free of cracks before restoring power and cycling the unit.

Technical Specifications

• Application: GG Series 60,000 to 75,000 BTU/h gas furnaces
• Component Type: Air pressure switch
• Replacement Type: Standard alternate

Standard Information

• Brand: MESTEK
• Manufacturer Part Number: j11r06780-008