The E20 error on your Hoover Dishwasher means there is a drainage problem preventing water from leaving the machine. This typically occurs when the pump is blocked or the drain hose is kinked, and can usually be fixed in under 30 minutes.
| Error code | E20 |
|---|---|
| Meaning | Drainage fault - water not draining properly |
| Severity | Medium — Dishwasher will not complete cycle but no immediate damage risk |
| Time to fix | 15–30 minutes |
| Tools needed | Towel, shallow container, pliers (optional) |
What the E20 error means
The E20 error code indicates that your Hoover dishwasher has detected a drainage issue and cannot remove water from the tub. The machine uses a pressure sensor to monitor water levels, and when water remains in the drum after the drain cycle should have completed, it triggers this error. The dishwasher will stop mid-cycle to prevent flooding and further problems.
Common causes
- Blocked drain filter filled with food debris, broken glass, or small objects
- Kinked or blocked drain hose preventing water flow
- Blocked sink or waste pipe that the dishwasher drains into
- Faulty drain pump unable to expel water effectively
- Blocked pump impeller jammed by debris or foreign objects
- Faulty pressure sensor incorrectly detecting water levels
How to fix the E20 error
- Check and clean the drain filter: Open the dishwasher door and remove the lower rack. Locate the circular filter at the bottom of the tub, turn it anticlockwise to unlock, and lift it out. Remove any food debris, broken glass, or objects. Rinse the filter under running water and check the sump area beneath for blockages. Replace the filter and ensure it clicks into place securely.
- Inspect the drain hose: Pull the dishwasher forward slightly to access the back. Locate the corrugated drain hose connected to the pump. Check for kinks, twists, or visible blockages. Disconnect the hose from the sink waste or standpipe connection and check both ends for obstructions. Run water through the hose to ensure it flows freely. Reconnect securely.
- Clear the sink waste pipe: If your dishwasher drains into a sink waste, remove any blockages from the sink trap. Disconnect the trap beneath the sink and clear any debris. Check that the spigot connection where the dishwasher hose connects is not blocked. Pour hot water down the sink to ensure clear flow before reconnecting everything.
- Check the drain pump: Access the drain pump by removing the filter and check the impeller for obstructions. Use pliers to carefully remove any debris wrapped around the impeller blades. Rotate the impeller by hand to ensure it spins freely. If it is stiff or does not move, the pump may be faulty and require replacement.
- Reset the dishwasher: Once you have cleared blockages, reset the machine by switching it off at the wall socket for 60 seconds. Switch back on and run a rinse cycle to test whether the error has cleared. If the E20 code returns, the drain pump or pressure sensor may need professional replacement.
- Test with an empty cycle: Run a short wash cycle without dishes to monitor drainage. Listen for the drain pump activating during the drain phase. If you hear the pump running but water remains, the pump is likely faulty. If the pump does not activate at all, check the electrical connections or call a qualified technician.
FAQ
Can I use my Hoover dishwasher with the E20 error showing?
No, you should not continue using the dishwasher when the E20 error appears. The machine has stopped the cycle because water is not draining properly, which can lead to flooding, water damage, or strain on the pump motor. Address the drainage issue before running another cycle.
How much does it cost to fix a Hoover dishwasher E20 error?
If the issue is a blocked filter or kinked hose, the fix costs nothing as you can do it yourself. If the drain pump has failed and needs replacement, expect to pay between £60 and £120 for the part, plus £80 to £150 for labour if you hire a technician. Total professional repair costs typically range from £140 to £270.
Why does my Hoover dishwasher keep showing E20 even after I clean the filter?
If the error persists after cleaning the filter, the blockage may be further down the drain hose, in the pump impeller, or in your household waste pipe. The drain pump itself may be faulty and unable to generate sufficient pressure to expel water. Check all drainage pathways and consider testing the pump for electrical continuity or mechanical failure.
