Thermistor | Pentair | 42001-0053S | NTC Thermistor | MasterTemp Heaters (For MasterTemp Heaters)

The Pentair MasterTemp Pool Heater Thermistor (42001-0053S) is a critical temperature sensor that ensures your MasterTemp heater reads water temperature accurately, delivering reliable heating performance.

Designed to keep pool water at a comfortable, healthy temperature, this genuine replacement part helps prevent erratic readings that can lead to short cycling or uneven heating. By maintaining precise temperature sensing, it supports proper filtration and consistent water quality across the season.

Ideal for pool owners and service professionals maintaining MasterTemp systems, this thermistor is built to withstand typical outdoor pool environments and chemical exposure while delivering dependable readings over time.

• Genuine Pentair replacement part — model 42001-0053S
• Precise temperature sensing for stable heater operation
• Easy-to-install replacement during routine maintenance
• Compatible with Pentair MasterTemp pool heater models
• Durable construction designed for wet, chemically treated pools

Keep your pool heating on schedule and your water properly filtered with this essential thermistor. Order today to ensure your MasterTemp system performs at its best.