PENTAIR High Limit Switch for Max-E-Therm and MasterTemp Heater Electrical System | 42001-0063S

Pentair High Limit Switch 42001-0063S

OEM high limit safety switch for Pentair MasterTemp and Max-E-Therm pool heater electrical systems.

Features

• Safety switch opens at unsafe high temperature conditions
• Designed for Pentair MasterTemp and Max-E-Therm heater electrical systems
• OEM replacement part for extended heater life

Description

The Pentair High Limit Switch 42001-0063S is a critical safety component for residential pool and spa heaters. It detects when the water in the heater reaches a temperature above the designed safe limit and interrupts operation to prevent overheating of the heat exchanger. This switch is a direct replacement for Pentair and Sta-Rite Max-E-Therm and MasterTemp heaters, restoring proper thermal protection and reducing the risk of recurring HLS faults.

Pro Tip

When replacing, inspect associated thermistors and wiring — a failing limit switch often indicates other wear points in heater control circuits.

We want you to have quick and easy access to warranty information for all the brands we carry. Please click on the links below to view each manufacturer’s warranty page:

• Pentair Warranty
  
• A&A (Pentair In-Floor) Warranty
  
• Fluidra Warranty (Zodiac / Jandy / Polaris / Caretaker)
  
• Paramount Warranty
  
• BlueSquare Warranty
  
• Hayward Warranty
  
• All Other Manufacturer Warranties
  

Note: Warranty coverage, registration, and service terms are provided directly by the manufacturer. Please review the details carefully to ensure proper understanding of coverage and claim procedures.