What does error code 20 mean on an Electrolux dishlex dishwasher?

Error code 20 on an Electrolux Dishlex dishwasher typically indicates a problem with the water drainage system. This may be due to a clogged filter, a kinked or blocked drain hose, or issues with the drain pump. To resolve this, check and clean the filter, ensure the drain hose is properly positioned, and inspect the drain pump for any obstructions. If the problem persists, it may require professional assistance.