Electrolux F21 oven: what it means & what to check

What F21 actually means

The oven has decided it is already too warm inside to begin the programme it was asked to run, so it has shut the cooking function down.

On this control system the oven checks its own starting temperature before it will run. If the board sees the cavity above roughly 40°C at the moment of starting, it cancels the operation and puts F21 on the display, and the message stays there until the control panel is switched off. It is a protective stop rather than a broken part \u2014 nine times out of ten the oven has been used recently and has not had a chance to drop back down.

What F21 looks like on a Electrolux oven

Most people find this page having searched for what the machine is doing rather than the code itself. On a Electrolux oven, F21 usually shows up as one or more of these:

Oven door won't open
Door won't lock or click shut
Door lock light flashing
Door stuck shut with the load inside
Won't start even with the door closed
Not heating up
Takes ages to get to temperature
Cuts out part way through cooking

Recognise any of those? That is this fault, and the rest of this page explains what causes it and what you can check yourself.

What usually causes it

Oven still hot from cooking shortly beforehand
Cooling fan not clearing heat from the cavity and control area
Door left closed on a hot oven with no airflow
Temperature sensor reading higher than the true cavity temperature
Fault on the control board misreading the start temperature

What you can safely check yourself

Work through these in order. Anything beyond this — panels off, testing parts, anything to do with the wiring — is an engineer's job, and not one to attempt with the machine plugged in.

Open the door and let the oven cool right down for an hour or two, then try again
Switch the oven off at the wall for a minute, restore power and reselect the programme
Listen for the cooling fan running after a normal cook \u2014 tell the engineer if you never hear it
Check nothing is blocking the vent at the top or edge of the door, such as a tea towel or trim guard
Make sure the oven is not shut inside a housing with the plinth or upper vent gap obstructed

Common questions about Electrolux F21

What does F21 mean on a Electrolux oven?

The oven has decided it is already too warm inside to begin the programme it was asked to run, so it has shut the cooking function down. On this control system the oven checks its own starting temperature before it will run. If the board sees the cavity above roughly 40°C at the moment of starting, it cancels the operation and puts F21 on the display, and the message stays there until the control panel is switched off. It is a protective stop rather than a broken part \u2014 nine times out of ten the oven has been used recently and has not had a chance to drop back down.

Can I fix Electrolux F21 myself?

There are 5 checks you can safely do yourself first.

Open the door and let the oven cool right down for an hour or two, then try again.
Switch the oven off at the wall for a minute, restore power and reselect the programme.
Listen for the cooling fan running after a normal cook \u2014 tell the engineer if you never hear it.
Check nothing is blocking the vent at the top or edge of the door, such as a tea towel or trim guard.
Make sure the oven is not shut inside a housing with the plinth or upper vent gap obstructed.

This sometimes clears with those checks. If it comes back, it needs looking at properly.

How much does it cost to repair Electrolux F21?

£66 including VAT for an engineer to come out and diagnose it, or £84 in total including VAT if it is put right on the visit and no parts are needed. Any parts needed are quoted on site before we fit them — you decide. Every repair carries a 90-day workmanship guarantee.

Tried the checks and it's still showing F21?

This sometimes clears with the checks above. If it comes back, it needs looking at properly. Then it wants someone who can open it up.

What it costs, before you call: the price is the same whatever the fault turns out to be — £66 including VAT for an engineer to come out and diagnose it, or £84 in total including VAT if it is put right on the visit and no parts are needed. Any parts needed are quoted on site before we fit them — you decide. Every repair carries a 90-day workmanship guarantee.

Our own engineers, not a call centre. We cover Nottinghamshire, Derbyshire and Leicestershire — most oven faults are seen same day or next day.

Call 0115 648 0929 Book online — postcode and number is all we need

Outside our area? The explanation above still stands — take it to a local engineer and tell them the code. Knowing it saves them time and you money.

Other Electrolux oven codes

All Electrolux fault codes and repairs →

What this looks like when it happens

Repairs we cover near you

Written by the engineers at ASAP Repairs, 0115 648 0929. We repair these machines for a living in Nottinghamshire, Derbyshire and Leicestershire.

Electrolux F21 error — oven