Pump controller shows E10 internal fault; pump will not run even though power is present.

Safety First: Disconnect power at the breaker and wait several minutes for internal capacitors to discharge before opening the drive housing.

• Visual inspection: Remove the Rheem control/drive cover. Look for burned components, bulged capacitors, or scorch marks on the PCB. If present, the board must be replaced.
• Check for water damage: Inspect gaskets and seals. Any signs of water intrusion (rust, mineral deposits) indicate the board has likely been compromised.
• Attempt a factory reset: If the board appears clean, restore power and perform a factory reset per the Rheem manual. Reprogram settings and test.
• Verify line voltage: Confirm correct voltage at the control input. Overvoltage or miswiring can cause repeated failures and must be corrected before installing a new board.
• Replace control module: If E10 persists after reset and wiring checks, replace the Rheem pump control/drive module with the exact part number specified for your model.