42001-0061S Air Flow Switch for MasterTemp & Max-E-Therm Pool Heaters | Pentair

42001-0061S Air Flow Switch for MasterTemp & Max-E-Therm Pool Heaters | Pentair

Marsoni

M251S

$159.99

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

42001-0061S Air Flow Switch for MasterTemp & Max-E-Therm Pool Heaters | PentairThe genuine OEM Pentair Air Flow Switch (42001 0061S) is the safety sensor that confirms adequate combustion air is reaching the burner before allowing ignition. It monitors the pressure differential across the air metering orifice; once airflow reaches the required threshold, the switch closes the circuit to the hot surface igniter (HSI), which lights the gas air mixture. During a typical heating call, the blower and HSI energize simultaneously.

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These are fabulous! The weight to them is perfect for tearing off a towel and not tipping. And the color/style works perfectly with our decor. Even my husband who rarely comments on anything said "I really like these!" I have one in my kitchen with regular paper towels and my laundry room with the microfiber towels. LOVE!!

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Reviewed in the United States on May 6, 2026

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Les in TX

West Palm Beach, US

★★★★★ 5

Looks sleek and works great

Color: Warm Gold, Color: Warm Gold

It looks very sleek. Perfect match in color to my kitchen hardware. I was afraid it wouldn’t work as well as my old one but it actually works much better. Less pulling off more paper towels than needed. Even the extra large paper towels fit on nicely.

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Reviewed in the United States on May 23, 2026

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Amazon Customer

Los Angeles, US

★★★★★ 5

Sturdy and nice looking

Color: Black

Looks great and works as designed

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Reviewed in the United States on May 16, 2026

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