Zanussi washing machine

Zanussi E66 error code: heater relay fault

Fault in the heating circuit.

Engineer jobTypical repair: £80–£170.

Likely causes

Relay fault
Failed element

How to fix E66

Unplug the washing machine (or switch off at the wall) for 5–10 minutes to clear any temporary fault, then restart it.
Engineer diagnosis.
Run a short test cycle. If E66 returns, the fault is still there and an engineer should look at it.

Always switch off and unplug the appliance before inspecting it. Never work on gas appliances or fixed electrical wiring yourself — call a Gas Safe registered engineer or a qualified electrician.

Full fault guide

Washing machine not heating waterDetailed causes, DIY steps and costs

Other Zanussi washing machine error codes

Zanussi washing machine repair near you

Frequently asked questions

What does Zanussi error code E66 mean?

Fault in the heating circuit. On a Zanussi washing machine, E66 is shown as "heater relay fault".

How do I clear the E66 error on a Zanussi washing machine?

Switch the appliance off at the wall for 5–10 minutes, then restart. If E66 comes back, work through the checks on this page — the fault is real and needs fixing, not just resetting.

How much does it cost to fix Zanussi E66?

£80–£170. is typical, depending on the part. Simple blockages cost nothing to clear yourself.

Does E66 mean the same on every Zanussi model?

Not always. Codes are broadly consistent within a brand, but model ranges differ. Check your manual if the symptoms below don’t match.