Sterling 261R06830005 Combustion Air Pressure Switch Kit for QVSF QVSB QVSD 400 MBH Unit Heaters

The Sterling 261R06830005 is an OEM replacement combustion air pressure switch kit designed specifically for Sterling QV Series Separated Combustion unit heaters — QVSF, QVSB, and QVSD models — rated at 400 MBH (117,230 BTU/hr) input capacity.

This pressure switch is a critical safety and ignition control component in Sterling's separated combustion heating systems. It monitors differential pressure between the combustion air inlet and the exhaust vent systems. When correct airflow is confirmed, it allows the indirect spark ignition system to energize, lighting the pilot and initiating the heating sequence. If the power ventor is not operating properly, the switch will prevent ignition, protecting against unsafe combustion conditions.

Key Features:

• Genuine OEM Sterling / Sterling HVAC replacement part
• Fits QVSF, QVSB, and QVSD separated combustion unit heaters at the 400 MBH size
• Functions as a combustion air pressure switch to verify proper venting before allowing ignition
• Part of the power vent system alongside the power ventor motor, blower, and sealed flue collector
• Compatible with both Natural Gas and LP Gas configurations
• Also referenced as part number 261R06830-005

Sterling HVAC's QV Series separated combustion unit heaters are engineered for installation in mildly hostile environments where dusty, dirty, or mildly corrosive conditions exist. The combustion air pressure switch is a standard safety feature on all QVSF, QVSB, and QVSD models, ensuring reliable and safe operation. This is a direct OEM replacement for the 400 MBH unit size.