The Swimables SW-41-061 Air Flow Switch is a critical safety and ignition component for Pentair MasterTemp and Max-E-Therm pool and spa heaters. This switch monitors the pressure differential across the air metering orifice to verify adequate combustion airflow before ignition can proceed. Once the blower generates sufficient air movement, the AFS closes its contacts, completing the circuit to the hot surface igniter (HSI) and initiating the fuel-lighting sequence. Within approximately 20 seconds of a heat call, the blower and HSI activate, the gas valve opens, and combustion begins. The HSI then transitions into flame-sensing mode, continuously verifying that a stable flame is present throughout the heating cycle.

Key Benefits

• Precision Pressure Detection: Monitors the pressure differential across the air metering orifice to confirm that combustion airflow meets safe operating thresholds before allowing ignition.
• Ignition Circuit Activation: Completes the electrical path to the hot surface igniter (HSI) only when adequate airflow is confirmed, ensuring safe and reliable startup every time.
• Rapid Heat Response: Coordinates with the blower and HSI so that gas valve activation and ignition occur within roughly 20 seconds of a heat demand signal.
• Continuous Flame Verification: Once combustion starts, the HSI enters a sensing mode that continuously monitors flame presence, adding an extra layer of operational safety.
• Core Heater Safety Part: Without a properly functioning air flow switch, the heater cannot safely ignite, making this component indispensable for both performance and protection.

What's Included

• Air Flow Switch
• Clip
• Clear Tubes
• (2)Bolts

Compatibility

• Compatible with most Pentair MasterTemp and Max-E-Therm Heaters

Specifications

• Brand: Swimables
• Part Number: SW-41-061

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SW-41-061
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