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

Marsoni M251S
Sale price$159.99
Pay 4 payments of $40.00 a month.Shop Pay
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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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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4.1 ★★★★★
Based on 413 reviews
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Z
Verified Purchase
zz top fan
Massapequa, US
★★★★★ 5
Stylish and well made.
Size: 13 Wide, Color: Brown Crazy Horse
Good fit and well made. I have had good luck with Florsheim.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
A
Verified Purchase
Amazon Customer
Belleville, US
★★★★★ 5
The Berkley Flex
Size: 7, Color: Cognac Multi
Very nice shoes, very comfortable, very nice leather. When ordering though, they fit a half size smaller than your size, because they are a tight-fitting shoe.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 25, 2025
M
Verified Purchase
Melissa S.
Charlottesville, US
★★★★★ 5
Better quality than most women’s shoes
Size: 7, Color: Black
I’m a woman and bought these for style and comfort after trying on too many others of multiple price points. These fit well and conformed to my feet after a single wear. Men’s clothes and shoes are so often of better quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 27, 2026
B
Verified Purchase
Bruce
Cuba, US
★★★★★ 4
Well made shoes.
Size: 11.5, Color: Black
Four stars because of the weight. Too heavy for my complete comfort. Also I have a narrow foot (C width) and these are too wide for me. Heavy socks make them wearable but not as comfortable as I would have liked.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 1, 2025
M
Verified Purchase
marsha
Phoenix, US
★★★★★ 5
Good look
Size: 11, Color: Brown Crazy Horse
Great look.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026

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