Microwave buttons not responding
A keypad that has stopped answering is usually locked, damp or reporting a key it thinks you are holding down, and each of those has a free answer.
What it usually means
The keypad is the part of a microwave an owner touches most, and it is the part that fails in the most misleading ways. There are two kinds. A membrane keypad is a printed sheet with conductive tracks and a small dome under each legend; it fails mechanically, and characteristically one key or one row dies while everything else works. A capacitive touch panel senses a fingertip through glass or plastic; it fails electrically, usually because something conductive — moisture, grease, a wet cloth — is bridging where it should not.
Which brings up the behaviour that confuses people most. Microwave controls are watching for a key held down, because a jammed button on an appliance that generates heat is a safety problem rather than an inconvenience. Held for more than about ten seconds and the appliance concludes something is stuck, stops accepting input entirely, and generally says so with a code. Several manufacturers publish exactly this: a stuck key or a key read as pressed too long, most often caused by moisture on the panel or something resting against it. So the appliance is not dead. It is refusing to take instructions from what it believes is a jammed button, and drying the panel thoroughly and wiping away any grease is a real fix rather than a hopeful one.
Before any of that, check the lock. Every make has a child lock and its giveaway is consistent: the display is alive, the door still opens, and every key is ignored. Some show a word, some a key symbol, some a padlock, and some show nothing at all, which is why it is worth checking the manual even when there is no clue on the screen. Releasing it is a hold on one specific button, and it differs by make. Miele go further and publish two separate locks with different behaviour, so on those it is worth knowing which one is on.
Then there is the appliance deliberately refusing. A microwave part way through a cooling run, or waiting for a hot cavity to come down before it will accept an automatic programme, will ignore what you ask of it and often display a word explaining why — and those words are not faults. Nor is demonstration mode, which on some models locks out normal operation while looking entirely healthy. A microwave with an interrupted programme loaded may also be waiting for the door to be closed rather than for you to press anything.
If the panel is dry, unlocked and not busy, the appliance is entitled to one power cycle. Unplug it for a few minutes and try again; a control board that has latched will often clear. Beyond that the diagnosis stops, and it stops for a specific reason rather than a cautious one. Keypads and control boards are serviceable parts, but they are reached by removing the outer casing, and inside that casing is a capacitor holding a dangerous charge whether the appliance is plugged in or not. This is the one appliance in the kitchen where unplugging it does not make the inside safe.
How to narrow it down
Work through these in order.
Is the display lit and does the door still open?
If the answer to both is yes, the appliance has power and its control board is running, which rules out the supply and points at a lock, a stuck key or a wet panel. If the display is blank and nothing responds, that is a different fault: check the socket, the plug fuse and whether anything else on that circuit has gone off.
Is there a padlock, a key symbol or a word like Loc on the display?
That is the child lock, and it is doing precisely what it was set to do. Every make releases it differently, generally by holding one particular button for a few seconds — often the stop or cancel key. Look up the sequence for your model rather than pressing everything, because on some makes there are two separate locks.
Is the panel wet, greasy or has anything been resting against it?
Wipe the whole control area dry with a clean towel, including into the recesses, and clear anything leaning on it. Moisture bridging a touch panel is read as a fingertip, and the appliance responds to what looks like a permanently held key by ignoring the keypad altogether. This is the commonest cause and it costs nothing.
Is there a code showing, and does it mention a key or a touch panel?
Several makes publish a specific code for a key held too long or read as stuck, and it is deliberately distinguishable from a hardware failure. If yours is showing one, look it up before assuming the keypad has failed, because the published remedy is usually cleaning and drying the panel rather than replacing anything.
Do some keys work and others not at all?
A pattern is informative. One dead key, or a row of them, points at a membrane keypad with a broken track, which is a part rather than a clean. Everything dead at once points at a lock, a stuck-key lockout or the control board. Note exactly which keys fail, because it shortens an engineer’s visit considerably.
Has it just finished cooking something, or is it showing a word rather than a number?
Appliances refuse input for legitimate reasons. A cooling run finishing, a cavity still too hot for an automatic programme, or an interrupted programme waiting for the door to be shut will all ignore the keypad, and most say so with a word that is not a fault. Give it ten minutes and try again before doing anything else.
Have you unplugged it for a few minutes?
One full power cycle is worth doing and is the manufacturers’ own first suggestion for a control that has latched. Take the plug out for five minutes, put it back and try again — the clock will need setting. If it works and then locks out again a day later, the fault is real and repeating, which is useful information.
How old is it, and what would a keypad cost against a new one?
Keypads and control boards are genuine parts, but they are behind the outer casing, so this is engineer work rather than a home repair whatever your confidence with a screwdriver. On an inexpensive countertop microwave a call-out plus a keypad exceeds the price of a replacement; on a built-in model it does not, and the aperture makes replacement the harder route.
Codes commonly shown with this
- ChildPanasonicThe child lock. The keypad is dead, the door still opens, and on Panasonic’s UK models three presses of Stop/Cancel clears it — three presses of Start is what set it.Usually simple to fix
- C-d0SamsungA touch key has been held for more than ten seconds. Usually moisture or dust on the panel, and Samsung ask you to clean the button.Usually simple to fix
- LOCLGNot a fault. LOC is LG’s child lock, and it releases by holding STOP/CLEAR until the display drops it.Usually simple to fix
- E0532BoschA button pressed too long or jammed. BSH publish one answer under three labels and it is the only microwave entry where they give the owner a real fix.Usually simple to fix
- Key symbolBoschNot a fault. BSH publish this as the childproof lock, released by holding the key-symbol button until the symbol goes out — about four seconds in Bosch’s manuals; freestanding models show SAFE.Usually simple to fix
- F2E1WhirlpoolA button is being read as held down. Whirlpool call it a stuck key failure, and it is the one public page in this family that is not about an oven.Usually simple to fix
When it is urgent
Take care
What it costs
Typical repair cost
£0–£150
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
Get an engineer to look at this
We do not pass enquiries to a repair firm, so there is no form here. When you book a qualified appliance engineer, tell them the make, the model and the exact code or message on the display, and ask whether they carry parts for this make — that is what turns one visit into a repair rather than a quote.
Technical review
Not reviewed by an engineer
No engineer has read this page. Severity follows what the manufacturer publishes, and we would rather tell you that than let a byline imply a sign-off.