42001-0061S Air Flow Switch Compatible with Pentair Mastertemp and Sta Rite Pool and Spa Heaters - Replacement AFS Compatible with Starite Max E Therm & Master Temp Heater

Critical Airflow Sensing: Our Air Flow Switch (AFS) Accurately detects the pressure drop across the air metering orifice, ensuring optimal airflow for ignition and proper combustion within the heater system.Automatic Circuit Activation: As soon as sufficient airflow is detected, the system automatically closes the circuit to the hot surface igniter (HSI), triggering ignition of the fuel mixture for immediate heater startup.Rapid Heat Response: In response to a heat demand, the AFS activates both the blower and HSI simultaneously, efficiently opening the gas valve and igniting the fuel mixture within approximately 20 seconds for quick heating.Compatibility with MasterTemp: Designed to fit Mastertemp 400 parts, mastertemp 300, Mastertemp 200 and Mastertemp 125. Also compatible with Sta-Rite SR333NA and SR200NA low nox pool heater parts, ensuring seamless integration and reliable performance across various heater systems.Vital for Safe and Efficient Operation: Replacement air flow switch kit ensures the reliable operation of your heating system by maintaining consistent performance, enhancing safety, and ensuring efficient heat delivery.