Oven
F23
The F23 error code on a Zanussi oven indicates a fault with the cooling fan circuit — specifically that the fan is not running or not running at the correct speed. It’s a moderately serious fault: your oven may lock out to prevent overheating, so it needs attention before the appliance is used again.
What does this error mean?
Zanussi ovens use a cooling fan to protect the control electronics and door from excessive heat during and after cooking. When the oven’s control board detects that the cooling fan is either not spinning, spinning too slowly, or drawing incorrect current, it throws the F23 code and shuts down as a safety measure. This is not a cooking element or temperature sensor fault — it’s specifically tied to the cooling circuit.
Est. repair cost
£15–£40 DIY fan motor replacement; £80–£150 professional repair; £140–£270 if control board also needs replacing
🔍 Likely causes
🛠️ Step-by-step fix
Power off and unplug the oven completely — wait at least 10 minutes for residual heat and charge to dissipate before touching anything.
Perform a hard reset: with the oven unplugged for 10 minutes, plug it back in and power on. If F23 clears and the fan audibly runs, monitor for recurrence over the next few uses.
Listen and feel for fan operation: with the oven on (if it allows), stand beside it — you should hear the cooling fan running near the top or rear. Silence or unusual grinding/rattling points to a mechanical fan fault.
Check for visible obstructions: if you can access the fan blade area through the rear vent or by removing the back panel (with oven fully unplugged and cool), look for grease blockage or debris jamming the blade. Clear carefully with a soft brush — do not use water near electrical components.
Check electrical connections: if comfortable doing so with the oven UNPLUGGED, inspect the wiring connector at the fan motor for corrosion or loose pins. Reseat the connector firmly. If wiring is visibly burnt or damaged, stop and call a professional.
Order a replacement cooling fan motor if confirmed faulty: search using your full model number (found inside the oven door frame). Zanussi cooling fan motors are widely available from UK spare parts suppliers such as eSpares or 4ourhouse for £15–£40. Fitting requires removing the back panel and is a manageable DIY task for a competent person — but if you are unsure, book a repair.
📞 When to call a professional
Call a qualified appliance repair engineer if the fan motor replacement does not clear the F23 code, if you find burnt wiring or a blown thermal fuse, or if the fault returns repeatedly — as this points to a failing control board which requires professional diagnosis. When booking, tell the engineer: ‘My Zanussi oven is showing error code F23, which I understand is a cooling fan circuit fault — I’ve already ruled out a simple obstruction.’
⚖️ Repair or replace?
A professional repair for an F23 fault typically costs £80–£150 including call-out, parts, and labour — more if the control board needs replacing (add £60–£120 for the board). If your Zanussi oven is under 7 years old and otherwise working well, repair is almost always the better value. If it’s over 10 years old and the control board is at fault, a new mid-range Zanussi or equivalent oven from £300–£450 is worth considering instead.