High‑pitched squealing or humming noise from Classeq dishwasher during drain, but machine still drains.

Safety first: Isolate power before working on the pump.

• Inspect for obstructions: Access the drain pump and remove the inlet hose or cover. Remove any debris from the impeller area.
• Check impeller and shaft: Spin the impeller by hand. If it wobbles or feels rough, the pump is worn and should be replaced.
• Secure mounting: Tighten any loose screws or brackets holding the pump to reduce vibration noise.
• Monitor performance: If noise worsens or drainage slows, replace the pump promptly to avoid complete failure.