Display shows E06 and pump will not start or runs erratically

Safety first: Disconnect power and allow the motor to cool completely before inspection.

• Check ambient and installation: Ensure the motor is not enclosed in a sealed box or exposed to direct sunlight without shade. Improve ventilation or add shading if necessary.
• Inspect sensor wiring: Open the control box and locate the low-voltage sensor leads from the motor (often labeled PTC/NTC). Check for loose terminals, corrosion, or damaged insulation. Reseat connectors.
• Check continuity: With power off, measure resistance across the temperature sensor leads. Compare to Franklin Electric specifications. An open or shorted sensor indicates a bad motor sensor.
• Bypass testing (technician only): Some drives allow temporary operation without sensor input for testing. Follow Franklin Electric documentation; do not leave it bypassed in normal service.
• Replace components as needed: If the sensor is faulty, replace the motor. If wiring and sensor test good, the drive’s sensor input circuit may be defective and the drive should be replaced.