Product Overview

The Pentair 461105 Control PCBA & Membrane Pad Replacement Kit is a complete OEM control-system restoration package for MasterTemp® and Max-E-Therm® pool and spa heaters. It includes both the main printed circuit board assembly (PCBA) and the six-button membrane keypad, allowing full restoration of the heater’s user interface, control logic, and system diagnostics. This kit is ideal for correcting unresponsive keypads, display errors, control failures or aged internal components without replacing the entire heater.

Ideal For

• Pool owners whose heater has become unresponsive, shows keypad failure, or is experiencing recurring control-board error codes.

• Technicians servicing MasterTemp® or Max-E-Therm® heaters that require a full control-panel refresh.

• Installations where the heater body, combustion system or wiring is still in good shape but control electronics need replacement.

• Facilities or commercial pools maintaining uptime and reliability by proactively replacing aging control components.

Key Features

• OEM Replacement Kit – includes both the PCBA control board and 6-button membrane pad designed specifically for Pentair MasterTemp® and Max-E-Therm® heaters.

• Restores Full User Interface – replaces worn, damaged or unresponsive keypads and restores heater menu navigation and operation.

• Corrects Control Logic Issues – resolves many common failures such as error codes, startup faults, and board communication problems.

• RS-485 Compatible – supports automation-ready control where required.

• Drop-In Installation – engineered for direct replacement using the original mounting points and wiring harnesses.

• Improves Reliability – refreshes vital electronics for improved heater lifespan and consistent performance under outdoor conditions.

Customer-Facing Q&A

Q: What does this kit replace?
A: It replaces the main control circuit board and the six-button keypad membrane—restoring the heater’s interface and logic functions.

Q: How do I know if I need this kit?
A: Symptoms include unresponsive buttons, missing display segments, recurring control errors, failure to ignite due to logic faults, or intermittent heater operation.

Q: Will this work for all MasterTemp® and Max-E-Therm® heaters?
A: It fits most models, but verifying your heater’s existing board number and model is recommended to ensure proper compatibility.

Q: Can I install this myself?
A: Installation should generally be done by a qualified pool technician familiar with heater wiring and safety protocols.

Q: Do I need to replace the entire heater?
A: Not usually. If the body, combustion system and wiring are intact, replacing the control PCBA and keypad can restore full functionality without replacing the whole unit.