The genuine Pentair Hi Limit Switch 42001-0063S is a factory-grade safety device that monitors water temperature and triggers an immediate shutdown of the heat exchanger whenever the temperature exceeds the safe threshold of 135¡F. A failed switch typically causes your heater to display the HLS error code, signaling that immediate replacement is necessary. Because this switch is a one-time-use safety component, it cannot be reset and must be swapped with a new unit. This OEM part is engineered to work with the majority of Pentair MasterTemp and Sta-Rite Max-E-Therm Natural Gas pool heaters.

Key Benefits

• Essential Overheat Protection: Continuously monitors water temperature and automatically shuts down the heat exchanger the moment readings surpass 135¡F, safeguarding your equipment and swimmers.
• Clear Diagnostic Feedback: When the switch activates, your heater displays the HLS error code, providing an unmistakable signal that the component needs to be replaced promptly.
• One-Time Safety Design: Engineered as a non-resettable device, this switch is purpose-built for replacement rather than repair, maintaining the highest level of operational safety.
• Extensive Heater Compatibility: Fits a wide array of Pentair MasterTemp, Sta-Rite Max-E-Therm, and ETI 400 Natural Gas heating units for straightforward, worry-free installation.

Compatibility

• Pentair Sta-Rite Max-E-Therm Heaters
• Pentair MasterTemp Heaters
• Pentair ETI 400 Heaters

Specifications

• Brand: Pentair
• Part Number: 42001-0063S

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