Sta-Rite Max-E-THERM Hi-Limit Switch
Pool Heater Replacement Part
Sta-Rite Max-E-THERM Hi-Limit Switch
Genuine Pentair replacement high-limit safety switch for Sta-Rite Max-E-Therm and Pentair MasterTemp pool heaters.
The Sta-Rite Max-E-THERM Hi-Limit Switch 42001-0063S is a genuine Pentair replacement safety component designed for compatible Sta-Rite Max-E-Therm® and Pentair MasterTemp® pool and spa heaters.
This high-limit switch monitors heater outlet water temperature and automatically opens the safety circuit if unsafe temperatures are detected, helping protect the heat exchanger and internal heater components from overheating damage. Compatible heater systems commonly display an HLS error code when this switch fails or activates. :contentReference[oaicite:0]{index=0}
Designed as a direct OEM replacement part, the 42001-0063S switch is commonly used in Max-E-Therm SR200, SR333, SR400, and compatible Pentair MasterTemp heater systems. :contentReference[oaicite:1]{index=1}
Main Features
Genuine replacement hi-limit switch designed for Pentair and Sta-Rite heater systems.
Detects excessive outlet water temperatures and interrupts heater operation to prevent overheating.
Fits compatible Sta-Rite Max-E-Therm and Pentair MasterTemp pool heaters.
Factory-specification high-limit safety threshold.
Designed for straightforward replacement using existing heater wiring connections.
Common repair part used during heater diagnostics and HLS error troubleshooting.
Specifications
| Part Number / SKU | 42001-0063S |
| Alternate Part Number | STA-151-6255 |
| Brand | Pentair / Sta-Rite |
| Product Type | High-Limit Safety Switch |
| Temperature Rating | 135°F |
| Compatibility |
Pentair MasterTemp Heaters: 460792, 460793, 460730, 460731, 460732, 460733, 460734, 460735, 460736, 460737, 460805, 460806 Pentair MasterTemp 125 A/G Heaters: 461058, 461059, 461060, 461061 Sta-Rite Max-E-Therm Heaters: SR200NA, SR200HD, SR200LP, SR333NA, SR333HD, SR333LP, SR400NA, SR400HD, SR400LP Pentair ETi Heaters: 461112, 461113 |
Application | Pool & Spa Heater Safety Control |
| Connection Type | Spade Terminal Connections |
| Thread Size | 1/4" NPT |
| UPC | 022315209831 |
| Final Sale | Yes |
| Warranty | Manufacturer Warranty Against Defects Only |
Frequently Asked Questions
This switch monitors heater outlet temperature and shuts the heater down if unsafe temperatures are detected to help prevent overheating damage.
Compatible models include Sta-Rite Max-E-Therm SR200, SR333, SR400, and compatible Pentair MasterTemp pool heaters.
An HLS code typically indicates the heater has detected a high-limit switch fault or overheating condition requiring diagnosis or replacement.
No. This switch is a replacement component and must be replaced if it fails.
No. Due to the nature of electrical heater components, this product is final sale.
Final Sale Item
This electrical and heater replacement component is a final sale item. Please verify compatibility before ordering.
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