What this error means
Anti-flood system activated — the machine has detected water in the base tray and has locked out to prevent flooding.
The EF0 error on a Zanussi washing machine means the anti-flood protection system has been triggered. A float switch located in the shallow base tray beneath the machine has detected water and has activated EF0 to halt all operation and prevent a flood. This is a safety-critical fault. The most common causes are a leaking door seal, excessive foam from too much or the wrong type of detergent, a loose or cracked internal hose connection, a leaking pump seal, or a cracked outer drum. The machine will remain locked out completely until the water in the base tray is removed and the tray is confirmed dry.
What you'll need first
Affiliate links — we may earn a small commission at no extra cost to you.
Step-by-step
Symptoms to look for
- EF0 displayed during or immediately after the start of a programme
- Machine locks out completely and will not begin or resume any programme
- Water visible on the floor beneath or in front of the machine
- Smell of damp or detergent from beneath the machine
Diagnostic steps
Disconnect the machine from the mains power socket immediately. Water in the base tray is in close proximity to the motor, pump, wiring, and control board. Investigating or attempting to operate the machine while powered is a serious electrocution risk.
With the machine unplugged and the water supply turned off, pull the machine forward from the wall. With a second person assisting, tilt it carefully backwards at approximately 45 degrees. Hold this position for 30 to 60 seconds to allow water to drain from the tray through the rear ventilation openings onto the floor. Lay towels behind the machine beforehand.
After draining, stand the machine upright and remove the lower access panel or kick strip to allow air circulation into the base. Use a hair dryer on a cool, low setting directed into the base for several minutes if needed. The float switch must be fully dry before EF0 will clear.
Excessive foam caused by too much detergent, non-HE detergent, or the wrong product overflows during the wash phase and drips into the base tray through internal gaps. This is one of the most common causes of EF0 in fully functional machines. Confirm you are using the correct Zanussi-compatible detergent and the correct dose for your water hardness setting.
Once the base is dry and EF0 has cleared, restore power and run a Cotton 40-degree programme. Remain present and watch the machine throughout the full cycle. Check around the door seal during the wash phase, beneath the machine at kickplate level during draining, and around the soap dispenser during filling.
With the machine unplugged and tilted or on its back, remove the base cover to view the tray and float switch. The float arm should rest in the lowered position with the tray bone dry. Confirm the arm moves freely up and down with nothing holding it in the raised (triggered) position.
When to call an engineer
- Door seal is visibly split, perished, or torn — must be replaced before the machine is used again
- Pump seal confirmed leaking — water residue visible around the pump body under the machine
- Outer drum or base tray has a visible crack or fracture — requires specialist assessment
- EF0 persists with the base tray completely dry — float switch has failed in the triggered position and must be replaced
Frequently asked questions
Is EF0 dangerous?
Can too much detergent cause EF0 on a Zanussi washing machine?
How do I reset EF0 after the base has dried?
Why does EF0 keep coming back on my Zanussi washing machine?
🎯 What is likely causing this fault?
⚠️ Estimates based on common faults — not a guaranteed diagnosis. Always verify before ordering parts.
Parts you may need
Enter your model number to filter results to your exact machine
Usually found on a label inside the door frame or on the back panel of the machine.
| Part | Approx. UK Cost | Find it |
|---|---|---|
| Door Seal | £30 - £40 | 🛒 Amazon UK → |
| Door Seal | £30 - £40 | 🏷️ eBay UK → |
ℹ️ Prices are approximate. Always check the part number matches your model before ordering. Not sure of your model number? Find out how to locate it here.