How to isolate a range cookera plain-English guide
An electric or dual fuel range cooker has no plug: five manufacturers describe a wall switch near but not above the cooker on a 30 or 32 amp circuit. All-gas ranges are the exception.
Before you start
What are you trying to do?
The right answer depends on what you can see. Pick the one that matches.
Choose the option on the left that matches what your appliance is doing, and the answer for that case appears here.
What are you trying to do?
Rangemaster and Falcon both publish the instruction to isolate the electricity supply before any thorough cleaning, and to let the cooker cool first.
Switch off at the wall isolator and let the appliance cool before you start.
What are you trying to do?
Both manufacturers publish a warning against manoeuvring the cooker while it is connected to the electricity supply, and a gas cooker on a flexible hose also needs its stability bracket or chain considered.
Isolate first. On a gas cooker, moving it is not an owner job at all — the connection and the restraint are Gas Safe work.
What are you trying to do?
The wall switch is the fastest route, and the consumer unit is the backup. Both manufacturers who publish fire advice tell you the fuse box may be enough to stop an electrical fire immediately.
Switch off at the wall or at the fuse box. Never use water on an electrical or a cooking oil fire, and if there is any doubt, get everyone out and call the fire service.
What this means
Almost every piece of appliance advice on the internet begins with unplugging it, and on an electric or dual fuel range cooker that instruction is useless, because there is no plug. This page exists because the wrong mental model here wastes time in exactly the situation where you do not have any — somebody reaching behind a hot cooker looking for a socket that was never fitted.
The fuel type decides it, and Belling publish the rule in one answer: dual fuel and electric range cookers need to be hard-wired to a 32 amp fused spur cooker point, while gas range cookers are 13 amp rated and supplied with a cable and a three-pin plug. Stoves add that their 100 and 110cm zoneless induction models need a 45 amp point, and Leisure explain why the electric ones arrive with no cable fitted: because of their power consumption they cannot be plugged into a standard 13 amp circuit and have to be hard-wired into a higher rated circuit by a qualified electrician. So an all-gas range cooker, which only needs mains for the ignition, the clock and the lights, usually does have a plug, and everything else does not.
What is actually there on an electric or dual fuel cooker is a switch on the wall. Belling put it in the plainest terms of any manufacturer in this category: if you will not be using the appliance for some time, switch off the power supply at the isolator switch on the wall. That is the vocabulary to look for, and it is usually a large square switch above the worktop, off to one side of the cooker rather than directly over it.
The manufacturers who publish installation requirements all describe the same arrangement from slightly different angles. AGA specify a 30 or 32 amp supply with a double pole isolator having a minimum contact clearance of 3mm, and add the siting rule: the isolator should not be positioned immediately above the cooker but must be within 2 metres of it. Smeg require an all-pole circuit breaker with enough contact separation for complete disconnection, located near the appliance and in an easily reachable position. Rangemaster and Falcon publish the sentence that contradicts what most owners assume, and they put part of it in capitals: the cooker must not be connected to an ordinary domestic power point.
The siting rule is the part worth remembering. The switch is deliberately not above the cooker, because reaching across a hot hob to turn something off in an emergency is the situation the regulation exists to prevent. So if you are looking directly above your cooker and finding nothing, look to the left and to the right at worktop height.
One apparent inconsistency that turns out not to be one. Belling’s all-gas cooker guide says to make sure you have turned off and unplugged your appliance before changing a bulb, while their electric guide describes the isolator switch on the wall. Both are right for the cooker they describe: the gas range is the 13 amp plug-in appliance and the electric one is hardwired. The same gas guide still asks for the supply to be through a switch giving all-pole disconnection with at least 3mm contact separation, so a switched socket rather than a bare one. Where an electric or dual fuel range cooker manual says unplug, read it as switch off at the cooker switch.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| The appliance is hardwired rather than plugged in | An electric or dual fuel range cooker draws far more than a 13 amp socket can supply, so it is connected directly to a dedicated cooker circuit — 32 amps in Belling’s and Stoves’ published requirement, 45 for Stoves’ zoneless induction models. There is no plug to pull and never was. | Common |
| The isolator is deliberately sited away from the cooker | AGA publish the rule explicitly: not immediately above the cooker, but within two metres of it. People look above the appliance, find nothing, and conclude there is no switch. | Common |
| A kitchen refit has hidden the switch | Cooker switches disappear behind splashbacks, inside wall units and occasionally behind the cooker itself when a kitchen has been changed around the original electrics. | Occasional |
| An all-gas range cooker that genuinely does have a plug | Not every range cooker is hardwired. Belling publish that their gas range cookers are 13 amp rated and supplied with a cable and a three-pin plug, because the electricity only runs the ignition, the clock and the lights. It is worth knowing which of the two you own before you need to know quickly. | Occasional |
What to try yourself
Look along the wall at worktop height on both sides of the cooker, not directly above it. You are looking for a large switch, usually square, often with a neon indicator and sometimes labelled Cooker.
If you cannot find one, go to the consumer unit. There will be a breaker labelled for the cooker, typically 30 or 32 amp, and switching that off isolates the appliance just as effectively.
Check it actually worked before you rely on it. The display should go dark and the cooling fan should stop. A cooker circuit that turns out to feed something else as well is not unheard of.
Do not isolate the cooker while the cooling fan is still running after cooking. Glen Dimplex specifically ask you to let the fan finish first.Learn where the switch is now rather than during an emergency, and make sure anybody else in the house knows too. In an electrical fire the manufacturers all say the same thing: switch off the power at the fuse box, and never use water.
Get a qualified appliance engineer to look at your range cooker
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.
What it costs to fix
Typical repair cost
£0
Time on site
5 minutes
Free. This is about locating and using something already installed. Fitting a new isolator where none exists is electrician’s work and priced as a job rather than a repair.
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
Own this appliance and had this code? . Nothing is published until a person has read it.
Related range cooker fault codes
- U400Get it checkedA 400-family code means the cooker has been connected to the wrong supply or wired incorrectly. Five badges from four manufacturers publish a version of it, and it appears at installation.Related: supply and connection
- Oven will not turn onUsually simple to fixOn most range cookers the ovens will not heat until the clock has been set, and the timer has to be in manual mode. Three manufacturers publish this themselves.Related: same brand
- HUsually simple to fixH on a zone display means the glass above it is still hot enough to burn you. It is a warning rather than a fault, and every brand sets its threshold differently.Related: same brand
- Cooling fan runs on after cookingUsually simple to fixA range cooker fan that keeps running for up to an hour after cooking is designed behaviour, and the maker of Stoves and Belling tells you not to switch the cooker off to stop it.Related: same brand
- Gas oven goes out after a minuteGet it checkedA gas oven that lights and then shuts down within a minute is usually the flame supervision device, and three manufacturers publish the same sixty-second answer.Related: same brand
Related guides
Common questions
How do I know whether my cooker is hardwired or plugged in?
Fuel type is the guide, and Belling publish it plainly: dual fuel and electric range cookers are hard-wired to a 32 amp cooker point, gas range cookers are 13 amp rated and come with a plug. Leisure say the same about their electric models, which are supplied without a cable precisely because an electrician has to hard-wire them. If in doubt, look for the wall switch first, and if there genuinely is not one, look behind the appliance.
Is switching off at the consumer unit as good as the wall switch?
For isolating the appliance, yes, and it is what you use when the wall switch cannot be found or reached. The wall switch exists to make isolation quick and reachable from the kitchen, which is why the manufacturers specify it within two metres and not directly above the hob.
My manual says to unplug the appliance. Which is right?
Check which cooker the manual is for. Belling’s all-gas guide says to unplug, and their gas range cookers really are supplied with a 13 amp plug; their electric guide describes the isolator switch on the wall, because that cooker is hardwired. Each is right for its own appliance. On any electric or dual fuel range cooker, an instruction to unplug should be read as switch off at the cooker switch.
Can I fit a cooker switch myself?
No. Adding or altering a cooker circuit is notifiable electrical work under Part P of the Building Regulations in England and Wales, and it is done by an electrician registered with a competent person scheme. Finding and using the existing switch is entirely yours.
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.
Sources and how we verified this
We establish the facts from the sources below and then write the explanation ourselves. We do not copy manufacturer wording and we do not host their manuals.
- Manufacturer technical and service documentation
This page has not been reviewed by an engineer, and we would rather tell you that than imply otherwise. The severity rating follows what the manufacturer publishes: where they say isolate the appliance and call someone, so do we.