What you can check safely
Clean user-accessible filters and spray arms as described in the manual, avoid overloading racks and use the recommended detergent.
Overloaded racks, blocked spray arms, dirty filters, detergent choice or water-temperature issues can affect results.
Clean user-accessible filters and spray arms as described in the manual, avoid overloading racks and use the recommended detergent.
Overloaded racks, blocked spray arms, dirty filters, detergent choice or water-temperature issues can affect results. Other causes may be possible; a technician needs the exact brand, model and symptoms to narrow them down.
Request an inspection if the problem continues after the basic checks, repeats, shows an error code, trips power, leaks, smells burnt, or involves internal components.
This guide is general information, not a model-specific repair procedure. Error codes and user checks can differ across manufacturers and models; consult the official manual for your appliance.