A Kärcher FC5 that leaves its rollers dry may need priming, a correctly seated nozzle cover or a released flow button. Separate tank seating, liquid flow, suction and brush drive before ordering a part. Empty dirty water, keep electrical areas dry and run only the short test described for this exact model family. What the alert means: Air in the water circuit, an incorrectly fitted nozzle cover or a depressed release mechanism can interrupt flow to both rollers. What to distinguish first: Check that both rollers remain dry rather than only one; then inspect the nozzle cover fit and the raised release button. 1. Confirm the exact symptom — Air in the water circuit, an incorrectly fitted nozzle cover or a depressed release mechanism can interrupt flow to both rollers. 2. Prepare safely — Switch off, unplug the charger and empty both tanks before removing a roller, filter or floorhead cover. 3. Apply the official check — Fill the clean tank, place the FC5 in its station with water and let it run for one to two minutes to prime the circuit. 4. Interpret one retest — Confirm both rollers moisten evenly. If flow is still absent with a correctly fitted cover, contact Kärcher rather than opening the pump. The official Kärcher procedure identifies this exact symptom and supports the checks above. Keep the charging port and motor vents dry, and never clear a blockage while the appliance can start. Stop for a damaged tank, battery heat, electrical smell, persistent leak or an error that returns after one clean test.
Models covered
- Kärcher FC 5 · FC 5
- Kärcher FC 5 Cordless · FC 5 Cordless
Safety first
- Keep the charging port and motor vents dry, and never clear a blockage while the appliance can start.
What the symptom may indicate
Checks in the right order
- Confirm the exact symptom
Air in the water circuit, an incorrectly fitted nozzle cover or a depressed release mechanism can interrupt flow to both rollers.
- Prepare safely
Switch off, unplug the charger and empty both tanks before removing a roller, filter or floorhead cover.
- Apply the official check
Fill the clean tank, place the FC5 in its station with water and let it run for one to two minutes to prime the circuit.
- Interpret one retest
Confirm both rollers moisten evenly. If flow is still absent with a correctly fitted cover, contact Kärcher rather than opening the pump.
Stop and get qualified help when
- Stop for a damaged tank, battery heat, electrical smell, persistent leak or an error that returns after one clean test.
Next step
Repair, replace a part, or arrange a diagnosis?
Use the checks and stop conditions above to choose a cautious next step. A symptom alone never proves that the appliance has failed.
Resolve it without buying anything
Complete the 4 user-accessible checks in order. If normal operation returns and no warning sign remains, no replacement is indicated.
Replace only the confirmed part
If the checks isolate a worn or blocked component, match its complete reference to the exact appliance model before ordering.
Kärcher Yellow multi-surface FC roller set
Kärcher official yellow multi-surface fc roller set, reference 2.055-006.0. Compatibility is published only for the exact appliance codes explicitly listed by the manufacturer source.
Amazon paid linkArrange a diagnosis before replacing the appliance
Stop at any warning sign listed above. A qualified diagnosis should confirm that repair is unsafe, unavailable or uneconomical before an appliance replacement is considered.
Sources used
- Kärcher — The official Kärcher procedure identifies this exact symptom and supports the checks above.
Last checked: 30 August 2026