Control board kit replacement model 420020007S, including 472610Z switch membrane pad. Designed as a direct replacement for MasterTemp MaxETherm All NA and LP pool and spa heater electrical systems, this kit upgrades key components to restore reliable heater control and extend service life. Key benefits Improved reliability: Upgraded solidstate capacitors and power chips with precision soldering reduce component failure and increase durability. Enhanced protection: Regulated power module and improved optocoupler module provide builtin overheat, overvoltage, and short circuit protection to help prevent damage from electrical faults. Faster, more efficient control: Higherperformance power electronics deliver quicker output response and more efficient operation of the heater control system. Complete replacement kit: Includes the control board and the 472610Z switch membrane pad for a straightforward service or task. What this kit does for you Restores full control functionality to compatible pool and spa heaters when the original board is failing or intermittent. Reduces the likelihood of repeated failures by replacing aging components with upgraded parts. Improves response time for heater control signals, helping maintain consistent water temperature. Compatibility and fit Compatible with Pentair MasterTemp MaxETherm All NA and LP pool and spa heater electrical systems. Exact part number match 420020007S with included 472610Z membrane pad ensures fit and function when replacing the original control board. Typical applications Homeowner : a failed control board to get a residential pool or spa heater back in service during the swim season. Maintenance service: Used by pool technicians during routine servicing or troubleshooting to eliminate intermittent control faults. System upgrade: Install to older or marginal boards with a unit that has improved thermal and electrical protection. Basic installation notes Designed for direct replacement in compatible heater electrical systems. Follow manufacturer service procedures and power isolation practices during installation. Verify compatibility with the specific heater model and serial range before installation. Technical highlights Part number 420020007S control board kit Includes 472610Z switch membrane pad Upgraded solidstate capacitors and power chips Improved optocoupler module and regulated power module Builtin protection for overheat, overvoltage, and short circuit conditions This control board kit provides a reliable, componentupgraded replacement to restore and improve the operation of compatible pool and spa heater electrical systems.