Swimables Replacement Hayward FD Heater Thermistor Replacement FDXLTER1930 | Swimables SW-42-931

Swimables Replacement Hayward FD Heater Thermistor Replacement FDXLTER1930 | Swimables SW-42-931

Marsoni

M251S

$34.99

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

Swimables Replacement Hayward FD Heater Thermistor Replacement FDXLTER1930 | Swimables SW-42-931When your Hayward Universal H Series Low NOx pool heater needs a new temperature sensor, the Swimables Thermistor SW 42 931 is the dependable answer. Functioning as a drop in replacement for the Hayward FDXLTER1930, this sensor precisely tracks water temperature inside the heater, enabling the control system to maintain peak efficiency and energy conservation. Engineered from resilient materials that hold up against sustained heat and moisture, the SW

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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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This has been wonderful. My son is a game show host and has to wear a blazer to work on game days. He throws this in the back of his car when he’s done and it’s went through a lot and still holds its shape. The colors look great and it’s comfortable. He says it doesn’t feel heavy on and is easy to take care of.

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Reviewed in the United States on June 4, 2026