Excessive foam builds up in the dirty water tank and may enter the motor protection area.

Safety first: Unplug the unit before opening the dirty water tank.

• Empty and rinse tank: Remove the dirty water tank, empty it, and rinse to remove foam.
• Use correct detergent: Only use Kärcher-approved carpet detergent at the recommended dilution. Avoid household soaps that foam heavily.
• Add defoamer: If recommended by Kärcher, add a small amount of defoaming agent to the dirty water tank to control foam.
• Rinse carpet: If carpets have residual shampoo from previous cleaning, perform a rinse-only pass with clean water to remove excess detergent.