What to do if Kärcher BPE 4000/45 Water Pump stops and all lights blink?
- Bbrian39Sep 12, 2025
If your Kärcher Water Pump stops and all the lights are blinking, it could be due to a couple of issues. There might be a failure on the suction side, preventing pressure from building up; try removing the pre-filter and cleaning it under flowing water, rinsing any dirt residues from the filter intake by opening the discharge opening, and check the connections to the suction side for leakage, and check the backflow valve. Alternatively, the flow meter might be jammed or missing; check its installation and correct orientation, and clean the flow meter. In either case, restart the pump by simultaneously pressing the + / - buttons.