Zanussi E21 Error Code — What It Means & How To Fix It

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For information purposes only. Always consult a qualified engineer before attempting repairs. 🔌 Unplug your appliance before any inspection or repair.

How serious is the Zanussi E21 error?

⚡ MEDIUM — Stop using machine until fixed.

What does the Zanussi E21 error code mean?

Similar to E20 but more likely related to a pump fault.

How to fix the Zanussi E21 error code

Clean filter thoroughly
Listen for pump operation
Inspect pump and wiring

Frequently Asked Questions

Is E21 worse than E20?
Yes — it often indicates a failing pump.

Will cleaning fix E21?
Sometimes, but not always.

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🎯 What is likely causing this fault?

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Blockage (filter/hose) 50%

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Pump failure 30%

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Pressure switch confusion 10%

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Wiring / PCB 10%

⚠️ Estimates based on common faults — not a guaranteed diagnosis. Always verify before ordering parts.

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Parts you may need

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Part	Approx. UK Cost	Find it
Drain Pump model filtered	£15 - £20	🛒 Amazon UK →
Drain Pump model filtered	£15 - £20	Find part →

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.

🇬🇧 UK — Parts & Replacements