Pentair High‑Limit Switch – Model 42001‑0063S
The Pentair 42001‑0063S is an OEM high‑limit safety switch designed for use in select Sta‑Rite Max‑E‑Therm and Pentair MasterTemp pool & spa heaters. It monitors high temperatures in the heater system and interrupts the electrical circuit if safe thresholds are exceeded.
Key Features:
- Fail‑safe thermal cut‑off switch for heater control systems
- Direct replacement part: 42001‑0063S
- Compatible with Sta‑Rite Max‑E‑Therm and Pentair MasterTemp heater electrical assemblies
Technical Specifications:
- Model / SKU: 42001‑0063S
- Function: High‑limit electrical switch — opens the circuit when the water or heat exchanger exceeds set temperature
- Application: Sta‑Rite Max‑E‑Therm (SR‑series) and Pentair MasterTemp heaters
- Warranty: 1 year limited (check manufacturer terms)
Maintenance Tip: When servicing the heater, always turn off power first. Verify correct part number and settings. Inspect thermal switch for signs of overheating or discoloration. Replace immediately if the heater displays a “HLS” error code or if the switch shows evidence of thermal stress. After installation, perform a system test run to confirm heater resets properly and all safeties are functioning.
SKU: 42001-0063S
