Franke disposal with electronic speed control shows E7; unit may start but runs erratically or at incorrect speed.

Safety first: Turn OFF power at the breaker before accessing the motor or control box.

• Inspect sensor wiring: Locate the small multi-wire harness running from the Franke motor to the control PCB. Ensure the connectors are fully seated and not corroded or pinched.
• Check for physical damage: Look for chafed wires or insulation damage near the motor housing where the harness exits.
• Reset control: Disconnect power for 5 minutes to allow the control to reset. Restore power and test again. If E7 returns immediately, the sensor or board is likely faulty.
• Replace sensor or motor: On many Franke models, the tachometer sensor is integrated into the motor assembly. If the sensor is not separately replaceable, the entire Franke disposer motor unit must be replaced.
• Replace control PCB if needed: If a known-good motor still triggers E7, replace the Franke control PCB.