E1633 – Generic dishwasher fault E1633

What E1633 means

Error E1633 on many Zanussi dishwasher models is used as a generic fault code. It usually points to a problem detected by the control board, such as a sensor reading outside the expected range or a cycle that could not complete.

Common causes

• Temporary software glitch or power fluctuation
• Blocked filter, hose or internal passage
• Sensor or wiring connection not making good contact

Quick checks you can do yourself

1. Turn the appliance off at the mains and leave it powered down for a few minutes.
2. Check and clean accessible filters, drains and hoses for blockages.
3. Inspect the door or lid area for obstructions preventing a good seal.
4. Restart a short cycle and monitor the appliance to see if the error returns.

Always unplug the appliance and switch off power at the mains before removing panels or working near wiring or water connections.

When to call a professional

If error E1633 reappears after simple checks and a power reset, there could be an internal electronics or sensor fault. At that point it is safer to have a qualified engineer test the appliance rather than replacing control boards or wiring blindly.

Recommended next steps

If the appliance continues to work normally after a reset and cleaning, keep an eye on it for a few days. If the same error appears frequently or is accompanied by unusual noises or smells, stop using the appliance and arrange a professional inspection.