Pentair MasterTemp & Max-E-Therm Heater Air Flow Switch 42001-0061S by Swimables | SW-41-061

Pentair MasterTemp & Max-E-Therm Heater Air Flow Switch 42001-0061S by Swimables | SW-41-061

Marsoni

M251S

$99.99

Get it in 3 business days with 1 day shipping. Friday, May 29

Pentair MasterTemp & Max-E-Therm Heater Air Flow Switch 42001-0061S by Swimables | SW-41-061The 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

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These are quite nice and also sturdy. Only complaint I have is that I bought a couple of these, and on one of them, only one of them, it was difficult to get the hidden mounts to go into the holes. I think it was probably a manufacturing defect thing. Also, on that particular one, it wasnt as level as the other. Not a show stopper, but if you need a perfectly level type of mounting situation, I would be careful here.

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Reviewed in the United States on September 14, 2025

Verified Purchase

NatKenneally

Los Angeles, US

★★★★★ 5

Great value/easy to install.

Size: 24x6 2Pcs, Color: Black, Size: 24x6 2Pcs, Color: Black

Great product and great value. Easy to install and adds a nice touch to a bathroom.

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Reviewed in the United States on March 21, 2026