Pentair Air Flow Switch For MasterTemp And Max-E-Therm Heaters | 42001-0061S Pentair EasyTouch Transformer fdxlbvs1930 fits all h150fdn through

fdxlbvs1930 fits all h150fdn through h500fd heaters

Its precision engineering ensures easy installation and maintenance

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Note: This Pressure Switch may be compatible with your heater

Engineered for Long-Term Use: Built with styrene frames and polypropylene mesh for resistance to pressure

Pentair Air Flow Switch For MasterTemp And Max-E-Therm Heaters | 42001-0061S Pentair EasyTouch Transformer fdxlbvs1930 fits all h150fdn throughThe OEM Pentair air flow switch (AFS), which senses the pressure drop across the air metering orifice. The air flow switch (AFS) senses the pressure drop across the air metering orifice. As soon as there is sufficient air flow, the AFS closes, closing the circuit to the hot surface igniter (HSI), which ignites the fuel mixture. On a call for heat, the blower and HSI are energized. In about 20 seconds, the gas valve opens and ignition occurs. The HSI