Product Overview
The Pentair MasterTemp® / Sta-Rite Max-E-Therm® Control PCBA Membrane Pad Replacement Kit, part number 461105Z, is an OEM heater control board replacement kit designed for compatible Pentair MasterTemp and Sta-Rite Max-E-Therm pool and spa heaters. This updated kit replaces the heater’s main control PCBA and membrane keypad assembly, helping restore heater operation, user controls, diagnostics, and automation communication.
This kit is commonly used when a compatible heater has a failed control board, damaged keypad, unresponsive buttons, display issues, or control-related error problems. It includes the updated PCBA, 6-button membrane pad, RS-485 assembly, and installation instructions. Pentair’s installation documentation identifies this replacement kit for MasterTemp and Max-E-Therm pool and spa heaters and states that it should be installed and serviced only by a qualified pool service professional.
Ideal For
Pentair MasterTemp pool and spa heaters with failed or unreliable control board operation.
Sta-Rite Max-E-Therm heaters requiring control board and keypad replacement.
Heaters with unresponsive buttons, display issues, or control-related diagnostics.
Service professionals replacing the older control board and membrane pad assembly.
Pool owners repairing a compatible heater instead of replacing the entire unit.
Systems requiring RS-485 communication capability for compatible automation integration.
Key Features
OEM Pentair Replacement Kit
Designed as a genuine Pentair replacement kit for compatible MasterTemp and Sta-Rite Max-E-Therm heater models.
Updated Control PCBA
Includes the updated printed circuit board assembly that manages heater control logic, operation, diagnostics, and communication.
6-Button Membrane Pad Included
The kit includes the 6-button membrane keypad, allowing replacement of both the control board and user interface components as a matched repair.
RS-485 Assembly Included
The included RS-485 assembly supports compatible automation communication when properly installed and configured.
Compatible Heater Applications
Commonly listed for Pentair MasterTemp heaters, MasterTemp 125 heaters, and Sta-Rite Max-E-Therm heaters.
New Version Replacement
This kit is commonly referenced as the newer replacement version for older MasterTemp / Max-E-Therm control board assemblies, including prior control board kit references such as 42002-0007S.
Benefits
Restores heater control board functionality.
Replaces worn, damaged, or unresponsive membrane keypad controls.
Helps correct control-related operation and display issues.
Supports compatible RS-485 automation communication.
Provides an OEM repair option for compatible Pentair and Sta-Rite heaters.
Can help avoid full heater replacement when the heat exchanger and other major components are still serviceable.
Specifications
| Specification | Details |
|---|---|
| Brand | Pentair |
| Product Type | Heater Control PCBA Membrane Pad Replacement Kit |
| Product Line Compatibility | MasterTemp® and Sta-Rite Max-E-Therm® |
| Manufacturer Part Number / SKU | 461105Z |
| Alternate / Related Part Number | 461105 |
| Older / Replaced Part Reference | 42002-0007S, commonly referenced by some suppliers |
| UPC / Barcode | 788379888244 |
| Control Type | Gas heater control board |
| Keypad Type | 6-button membrane pad |
| Communication Assembly | RS-485 assembly included |
| Compatible Equipment | Pentair MasterTemp, MasterTemp 125, and Sta-Rite Max-E-Therm pool and spa heaters |
| Fuel Compatibility | Used with compatible natural gas and propane heater models where specified by heater parts diagram |
| Included Components | New PCBA, 6-button membrane pad, RS-485 assembly, and installation instructions |
| Complete Heater | No, replacement control kit only |
| Installation | Qualified pool service professional required |
| Manufacturer | Pentair |
Customer-Facing Q&A
What is the Pentair 461105Z used for?
The Pentair 461105Z is used to replace the control PCBA and membrane keypad on compatible Pentair MasterTemp and Sta-Rite Max-E-Therm pool and spa heaters.
Does this kit include the keypad?
Yes. This kit includes the 6-button membrane pad along with the replacement control PCBA.
Does this include the RS-485 assembly?
Yes. The kit is commonly listed with the RS-485 assembly included.
Is this a complete heater?
No. This is a replacement control board and membrane pad kit only. It is not a complete heater, burner assembly, manifold, heat exchanger, or ignition system.
Which heaters does this fit?
This kit is commonly used with Pentair MasterTemp heaters, MasterTemp 125 heaters, and Sta-Rite Max-E-Therm heaters. Compatibility should be confirmed using the heater model, serial number, and parts diagram before ordering.
Is this the new version?
Yes. The 461105Z is commonly listed as the newer control PCBA membrane pad replacement kit version for compatible MasterTemp and Max-E-Therm heaters.
Can this fix an unresponsive heater keypad?
It may fix keypad and control board related issues if the problem is caused by the PCBA or membrane pad. A qualified technician should diagnose the heater before replacing parts.
Should this be professionally installed?
Yes. Pentair’s installation instructions state that this product should be installed and serviced only by a qualified pool service professional.