What This Part Is Used For The Hayward SPX3400DR is a variable speed pump drive used on compatible Hayward variable speed pump applications. It controls motor speed and programming so the pump can run different flow rates for filtration, heating, and cleaner cycles. This drive is part of the pump control system at the equipment pad. Why This Part Matters When a drive fails, the pump may not run, may shut off on faults, or may lose speed control, which quickly impacts water clarity and heater and chlorination performance. Drive failures can also present as random resets or an inability to hold schedules. Replacing the correct drive restores control and stable operation without replacing the whole pump. This is commonly needed when the motor and wet end are still in good condition but electronics have failed. Key Features and Specifications Manufacturer part number: SPX3400DR Variable speed pump drive for compatible Hayward pump applications Controls motor speed and programmed run schedules Replacement part for failed or malfunctioning drive electronics Used during variable speed pump drive service and repair Installation and Fitment Guidance Shut off power at the breaker and verify the circuit is de-energized before servicing the drive. Confirm connections are secure and keep the drive protected from direct water exposure on the pad. Confirm by manufacturer part number before ordering. About the Hayward Brand Hayward builds a full residential pool equipment ecosystem including pumps, filters, heaters, automation, cleaners, chlorination systems, and service parts. Their variable speed pumps integrate with automation and heater systems to deliver efficient circulation and consistent flow. Replacement drives support serviceability by allowing targeted repairs instead of full pump replacement. Hayward equipment is widely supported across residential pool systems. Common Service Context Techs typically replace drives when a variable speed pump shows drive faults, won’t respond to programming, or won’t run even though power is present. It is often identified after verifying the wet end turns freely and the issue tracks to the control electronics.
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