Pentair DSI Ignition Control | MiniMax 75 & 100 | 471091

Description

The Pentair 471091 is the OEM Direct Spark Ignition (DSI) control board for Pentair MiniMax 75 and MiniMax 100 pool and spa heaters.

IMPORTANT: LICENSED PROFESSIONAL INSTALLATION REQUIRED
Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high-voltage components without proper certification.

The DSI control module manages the direct spark ignition sequence on the MiniMax 75 and 100 heater. When this board fails, the heater will not ignite reliably — or at all. Replacing it with the correct OEM part restores the factory ignition sequence and timing.

Specifications

Poolaroo Pro Tip

Before replacing the DSI control, verify the ignition failure is not caused by a dirty flame sensor, obstructed burner tray, or gas supply issue — these are common causes of ignition faults that do not require a control board replacement. If the board is confirmed faulty, have a licensed technician perform the swap. Consult your MiniMax heater’s service manual for the correct ignition sequence parameters to verify the replacement board is operating as expected after installation.