Pentair Max-E-Therm/MasterTemp Hi-Limit Switch, 1/4" NPT (42001-0063S) crosses This Hayward AquaRite PCB replacement

This Hayward AquaRite PCB replacement helps restore system control when the original board is damaged

It is intended for the listed 5

and SPST relationship gives this timer its practical value because time-control components work best when they match the original switching style and electrical role closely

Designed for pool cleaner repair and maintenance

filtration can steadily become less effective than it should

Pentair Max-E-Therm/MasterTemp Hi-Limit Switch, 1/4" NPT (42001-0063S) crosses This Hayward AquaRite PCB replacementProtect compatible Max E Therm and MasterTemp heaters from excessive temperature conditions with this 1 4" NPT hi limit switch. The hi limit switch is an important safeguard that helps monitor heat levels and interrupt operation when temperatures move outside the acceptable range. This replacement is commonly used when troubleshooting heater shutdowns, overheating concerns, or failed safety switch readings. It should be installed with attention to