Find your parts diagram
Sticker on the pump body (the part with the basket), not on the motor. Motor labels from Century, A.O. Smith or Regal won't match parts.
Label on the side of the tank near the base. Size is in sq ft, e.g. 420 sq ft = C4030 or CCP420.
Rating plate inside the front access panel. Note the BTU and gas type (NG or LP).
Molded into the body or printed on top. Robotic cleaners: on the power supply.
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Pentair High Limit Switch for MasterTemp And Max-E-Therm Heaters | 42001-0063S
Fits these models (11)
+7 more models
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Goes with this part
CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
Other parts on the same Pentair ETi 400 Heater
The OEM Pentair Hi Limit Switch 42001-0063S is a safety switch used to detect when water temperature has exceeded a safe level (135°F) and immediately opens the heat exchanger out. When this fails, your system will typically show error code HLS. The Hi Limit Switch cannot be reset, it must be replaced. This OEM Pentair Hi Limit Switch 42001-0063SS is compatible with most Pentair MasterTemp and Sta-Rite Max-E-Therm Natural Gas Swimming Pool Heaters.
- Critical Safety Feature: Activates by detecting unsafe water temperatures above 135°F, instantly preventing heat exchanger overload.
- Error Code Indicator: Designed to display an HLS error code as a clear indicator of failure, necessitating a timely replacement.
- Mandatory Replacement: As a non-resettable component, this OEM Hi Limit Switch is built to be replaced, not repaired, ensuring ongoing safety.
- Broad Compatibility: Compatible with a wide range of Pentair heaters, including MasterTemp and Sta-Rite Max-E-Therm Natural Gas models.
- Pentair Sta-Rite Max-E-Therm Heaters
- Pentair MasterTemp Heaters
- Pentair ETI 400 Heaters
