DIY GUIDE · HOME REPAIRS & HANDYMAN

How to fix an oven, hob or cooker hood that is not working properly yourself
An hour or two. Usually nothing; €5–€40 for an oven cleaner or a carbon filter.

The owner’s checks for an oven, hob or hood that is not working right — settings, seals, burners, filters — and the legal stop at gas and wiring.

DIFFICULTY
Easy
part of the job only
TIME
An hour or two
most of it is cleaning: burner parts and grease filters need to soak, rinse and dry
MATERIALS
€0–€40
nothing for a setting or a seal; a carbon filter for a recirculating hood is the main cost
A PRO CHARGES
€70–€260
typically €120
  • Every step, start to finish
  • Checked October 2026 — sources at the end
  • Honest about when to call a pro

FIRST, THE HONEST ANSWER

Do it yourself, or get a repairer?

Do it yourself if…

  • The oven heats but bakes unevenly, takes longer than it used to, or the door does not seem to close tightly
  • The clock is flashing, the controls do nothing, or the oven heats the fan but not the food — a setting or a mode
  • A gas hob burner lights unevenly, with a lazy yellow flame, or clicks after you have cleaned it
  • The cooker hood barely clears steam, drips grease or smells of old cooking

Get a pro if…

  • You can smell gas at any time — leave, ventilate and call the gas emergency number
  • A gas burner will not stay lit after you let go of the knob, or the flame looks wrong with the parts seated correctly
  • The oven will not heat at all with power on, trips the electrics, or there is a burning smell from the controls
  • The appliance is hard-wired on a cooker circuit and needs disconnecting or moving
  • A heating element, fan motor, thermostat or control board needs replacing

Safety first

  • If you smell gas, do not operate switches or naked flames. Open windows, leave and call the gas emergency number, 1800 205050, from outside.
  • Gas work is for a Registered Gas Installer only. Owner maintenance stops at the removable burner caps, crowns and pan supports.
  • Let the oven and hob cool before cleaning, and isolate at the cooker switch or plug before you work near the elements or the hood motor.
  • A hard-wired cooker on its own circuit is part of the fixed installation. Disconnecting, moving or rewiring it is a job for a Registered Electrical Contractor.
  • Oven cleaners are caustic. Wear gloves and eye protection, ventilate the kitchen, and follow the label.

Stop here: The gas side and the fixed wiring

This is where Irish law begins. Any work on a gas appliance beyond its removable burner parts — injectors, taps, flame-failure devices, pipework, connecting or converting it — is gas work, and it is illegal for anyone but a Registered Gas Installer to do it; the RGI scheme is run on behalf of the CRU. A cooker wired into its own circuit is part of the fixed installation, and new circuits and changes at the fuse board are restricted electrical works under S.I. 264/2013, which only a Registered Electrical Contractor may carry out. How to hire an appliance engineer →

MATERIALCOVERAGEFOR THIS JOB
Oven cleanerOne spray bottleFor enamel interiors only, never on catalytic liners or seals
Carbon filter for a recirculating hoodBought by the hood’s model numberReplace when smells linger with clean grease filters
Replacement grease filter or oven sealBought by model numberOnly if a filter is distorted or a seal is torn

Is the oven running at the temperature you set?

Put an oven thermometer on the middle shelf, set the oven to 180°C on conventional heat, and read the thermometer once the heating light has cycled off and on a few times. If it reads 165°C, the oven is running about 15 degrees cool: first take out spare trays and check the door seal, then compensate by setting it higher. A gap that grows over months, or an oven that never reaches temperature at all, is the thermostat or element — a technician’s job.

Ovens cycle above and below the set point, so take two or three readings a few minutes apart and average them.

Settings and modes come first

A modern oven can look broken when it is only in a locked, timed, demo or catalytic mode. A flashing clock after a power cut on many ovens has to be set before the oven will heat. Some ovens have a showroom demonstration mode in which the controls and fan work but the elements stay cold. Check the manual’s settings menu before you suspect a fault.

Uneven baking is usually the load, the shelf or the door

One maker’s fix list for food browned unevenly runs: turn the temperature down by 10–20 °C and bake for longer, use the shelf level the recipe or cooking chart gives, choose the right heating mode, and take out trays and accessories you are not using, because they block the air. A door that is not seated properly on its hinges, or a seal that has slipped, lets heat leak at the front and cooks the back harder.

The door seal: clean it, or leave it alone

Ovens use one of two kinds of door seal. A silicone seal should be wiped clean promptly with a soft soapy cloth, because baked-on grease makes it brittle and cracked. A woven fibreglass seal is delicate and is damaged by rubbing or scouring, so the maker’s advice is to avoid cleaning it at all. Know which one you have before you reach for the cloth.

Gas hob flames tell you what is wrong

A healthy natural-gas or LPG flame is crisp and mostly blue. Uneven flames, a yellow lazy flame or a burner that only lights on one side usually mean the burner cap or crown has been put back crooked after cleaning, or the ports are blocked with spill. Reseating and drying those removable parts is owner maintenance. Anything behind them — the injector, the gas tap, the pipework, the flame-failure device — is gas work.

A hood is only as good as its filters

The metal grease filters trap fat from the steam. One maker’s advice is to run them through the dishwasher on their own, at no more than 65 °C, every 3–4 weeks, because grease left for 3–4 months can harden until it will not come out at all. A recirculating hood also has carbon filters that absorb smells; they are replaced, not washed, and when they are spent the hood moves air but leaves the smell.

Find the rating plate — on the oven frame when the door is open, or under the hob — and note the model number before ordering any part.
If your hob or oven runs on bottled LPG, note that too; burner parts differ from natural-gas ones, and only an RGI should convert an appliance.

THE PART THAT DECIDES THE FINISH

Before you start — the appliance and the space

Pick the case that matches your appliance. Every one starts with the appliance off and cool; for anything wired, isolate it at the cooker switch or the plug.

Electric oven or cooker

Heats unevenly, slowly, or not at all, or the controls will not respond.

  1. Let the oven cool completely before you touch the door, seal or shelves
  2. Switch off at the cooker isolator switch on the wall, or unplug a plug-in oven
  3. Take out every tray and shelf you are not using
  4. Find the manual’s settings section — clock, child lock, demo mode, timer
Gas hob

Burners light unevenly, burn yellow, or click without lighting.

  1. Turn every knob off and let the burners cool
  2. If you smell gas at any point, stop, open windows, do not use switches and call the emergency line
  3. Lift off the pan supports and set them in the sink
  4. Lay out a towel to set burner caps and crowns on in order, so each goes back on its own burner
Electric or induction hob

A zone will not heat, heats weakly, or shows a code.

  1. Check the hob lock and any timer on the display first
  2. For induction, have a pan with a magnetic base ready — a fridge magnet should stick to it
  3. Let the glass cool; residual heat warnings mean it is still hot
  4. Wipe the glass and the controls dry; water on the touch panel can stop it responding
Cooker hood

Weak extraction, grease drips, smells that linger.

  1. Switch the hood off and isolate it at its plug or fused spur where you can reach it
  2. Find the release catch on each grease filter
  3. Check whether your hood is ducted outside or recirculating with carbon filters
  4. Clear the dishwasher, or fill a sink with hot soapy water, for the filters

THE JOB

How to fix an oven, hob or cooker hood, in order

  1. Read the display and reset the settings

    10 min

    Look at the oven display for a flashing clock, a lock symbol, a timer or a mode you do not recognise. Set the clock if it flashes, cancel any delay timer, and switch off the child lock. Go into the settings menu and check demo or showroom mode is off; in that mode the controls and lights work but the elements stay cold. On a hob, check the lock and any zone timers.

    • After a power cut many ovens will not heat until the time is set
    • Write down any code the display shows; the manual’s table often explains it
    • A tripped cooker isolator or a tripped breaker at the fuse board kills everything — check both

    Mistake to avoid: Ordering an element because the oven stays cold. A demo mode or an unset clock gives exactly the same symptom.

  2. Check the door, the hinges and the seal

    15 min

    With the oven cold, open and close the door slowly and watch where it meets the frame. It should sit square on both hinges and the latch, if fitted, should engage. Look round the seal for a section that has slipped out of its clips, a crushed corner or a gap. If you have a silicone seal, lift the grease off with a soft cloth dipped in warm soapy water, then dry it. If it is woven fibreglass, leave it alone unless the maker’s manual says otherwise.

    • A seal clipped back into its holes often fixes uneven baking at the front
    • Check for a shelf or tray pushed so far back that it stops the door closing
    • A brittle, cracked or badly worn seal is replaced by model number

    Mistake to avoid: Scrubbing a fibreglass seal with a scourer. It frays, the gap gets bigger, and the seal has to be replaced.

  3. Clear the oven and test the temperature

    45 min

    Take out every tray and accessory you are not cooking on, including any grease filter you only need when roasting. Put an oven thermometer on the middle shelf and preheat on conventional heat. Read it once the heating light has cycled a few times. If it reads cool, set the oven a little higher next time, use the shelf level the cooking chart gives, and avoid any rapid heat-up function for delicate baking.

    • One maker suggests 10–20 °C lower and a longer bake if tops brown unevenly
    • Bake on one tray at a time while you test; two trays change the airflow
    • Note your oven’s offset on a sticker inside a cupboard door

    Mistake to avoid: Leaving every tray in the oven. They block the air, and the food on the shelf you use cooks unevenly.

  4. Clean the oven interior properly

    1 hr

    With the oven cold and switched off, clean enamel surfaces with a cleaner made for ovens, following the label for how long to leave it, and rinse well. Catalytic liners — the rough, grey panels on the sides or back of some ovens — clean themselves at high temperature and are damaged by oven cleaner, so leave them alone. Wipe the glass with a microfibre cloth. Run the oven empty for a while afterwards with a window open to burn off any residue.

    • Wear gloves and keep oven cleaner off seals, the fan and catalytic panels
    • Take shelves and racks out and soak them in the sink
    • A pyrolytic oven has its own cleaning programme — use that instead

    Mistake to avoid: Spraying cleaner on catalytic liners or the door seal. It ruins the liner’s coating and hardens the seal.

  5. Clean and reseat gas hob burners

    30 min

    With every knob off and the hob cold, lift off the pan supports, then the burner caps and the burner crowns, keeping each set together. Soak them in hot soapy water, scrub gently with a soft brush and clear blocked flame ports with a cocktail stick. Rinse and dry them completely — water in a port stops it lighting. Refit each crown so it sits flat and keyed into its base, then put the cap on dead centre. Light each burner and check the flame is even all round.

    • A crown or cap sitting slightly crooked is the commonest cause of an uneven or yellow flame
    • Keep the ignition electrode and the thermocouple probe clean and dry, but do not bend them
    • Wipe up boil-overs as soon as the hob is cool; burnt sugar blocks ports fast

    Mistake to avoid: Unscrewing anything below the burner crown. The injector, the gas tap and the flame-failure device are gas parts, and working on them is gas work.

  6. Check pans and settings on an induction or electric hob

    10 min

    If an induction zone will not heat, try a pan you know works and check a magnet sticks to its base; non-magnetic pans are not detected. Use a pan that covers the ring marking. Check the hob lock and timers on the display, and dry the glass and touch controls. On a ceramic or solid-plate electric hob, a single zone that stays cold with others working is a fault in that element.

    • Warped or very thin pan bases heat poorly on induction
    • Some induction hobs cut power if the pan is lifted for more than a moment
    • A cracked glass top must not be used — switch it off and isolate it

    Mistake to avoid: Using a cracked glass hob because the zone still heats. Spilled liquid can reach live parts through the crack.

  7. Wash the hood’s grease filters

    30 min

    Switch the hood off, press the release catch on each metal grease filter and lower it out. Wash them in the dishwasher on their own, standing at an angle, on a programme no hotter than 65 °C, or soak them in hot soapy water and brush them softly. Let them dry fully, then click them back in. While they are out, wipe the inside of the hood with a damp, soapy cloth, keeping water away from the lights and the motor housing.

    • Do the filters every 3–4 weeks; one maker warns grease left for 3–4 months can set hard
    • Some aluminium filters discolour in a dishwasher — that is cosmetic
    • Wear gloves; filter edges can be sharp

    Mistake to avoid: Putting the filters back wet or leaving them out. Grease goes straight into the fan and the duct.

  8. Replace carbon filters on a recirculating hood

    15 min

    If your hood recirculates the air back into the kitchen, it has carbon filters behind or above the grease filters. They cannot be washed. Look up the right replacement by the hood’s model number, take the old filters out as the manual shows, and fit the new ones the same way round. Reset the filter reminder if the hood has one.

    • A ducted hood has no carbon filters — if yours vents outside, check the duct is not crushed instead
    • Date the new filters with a marker so you know when they were changed
    • Run the hood on a higher speed for frying; the lowest speed is for simmering

    Mistake to avoid: Washing a carbon filter. It stops absorbing smells and can drip into the motor.

  9. Test everything and know your limit

    20 min

    Switch the power back on. Preheat the oven and check the thermometer again. Light each gas burner and check the flame. Run the hood on each speed. If the oven still will not heat, a burner still will not stay lit with its parts seated properly, or the hood motor will not run, the fault is past the owner’s work, and this is where you stop.

    • Note the fault code and the model number for the technician
    • If anything smells hot or electrical, switch off and isolate at once
    • Keep the receipts for any parts you bought, in case of a guarantee claim

    Mistake to avoid: Carrying on with a burner that will not stay lit. The flame-failure device may be faulty, which is a gas safety issue.

The mistakes that make it worse

  • Unscrewing anything below a gas burner crown
  • Spraying oven cleaner on catalytic liners, seals or the fan
  • Cleaning a fibreglass door seal with a scourer
  • Leaving grease filters for months until the fat sets hard
  • Disconnecting a hard-wired cooker to pull it out

Stop here and get an appliance repair technician

  • The oven stays cold, or will not reach temperature, with every setting and the door seal right
  • A gas burner will not stay lit, or the flame looks wrong with clean, dry parts seated correctly
  • The hood motor, lights or controls fail with clean filters
  • An element, fan, thermostat, ignition unit or control board needs replacing, or the appliance trips the electrics
How to hire an appliance engineer →

Oven not heating but the light and fan workOften a demo mode, an unset clock after a power cut or a timer. Check the settings menu. If the elements stay cold with every setting right, call a technician.
Oven cooks unevenly, front lighter than backThe door is not seated or the seal has slipped, letting heat out at the front. Reseat the door, clip the seal back, and remove spare trays.
Tops of cakes brown too fastToo hot, the wrong shelf, or a fan mode on a delicate bake. Lower the temperature, use the cooking chart’s shelf, and try conventional heat.
Gas burner lights unevenly or with a yellow flameThe cap or crown is crooked, wet or blocked after cleaning. Dry them, clear the ports with a cocktail stick and seat them flat and centred.
Gas burner goes out when you let go of the knobHold the knob in a little longer to let the safety device warm up. If it still goes out with clean, dry parts, call a Registered Gas Installer.
Induction zone shows a pan symbol and will not heatThe pan is not magnetic, too small for the ring, or warped. Try a pan a magnet sticks to, sized to the ring.
Cooker hood not extracting wellThe grease filters are clogged, or the carbon filters are spent on a recirculating hood. Wash the grease filters and replace the carbon filters.
Smell of gas in the kitchenTurn off the appliance if it is safe to, open windows, do not use switches or flames, leave, and call the gas emergency number from outside.

WHAT YOU SAVE

What it costs to do it yourself

Oven cleaner spray€5–€9.65
Carbon filter for a recirculating hood€27–€37
Total, a typical setting, seal, burner or filter fault€0–€40
DIY total€0–€40
An appliance engineer charges per repair
LOW
€70
TYPICAL
€120
HIGH
€260
Appliance Repair price guide →

Guide prices compiled by the Locufy team from published Irish and UK provider price lists and 2026/27 cost guides. Updated 2026.

Settings, seals and burner parts cost nothing to put right. Carbon filters are the main running cost of a recirculating hood. If the fault is an element, thermostat, ignition or control board, the price guide band is what the repair costs.

RATHER NOT?

Appliance engineers near you, with prices shown

The ones who cover your area, nearest first, with one score from every review. No account needed to look.

Or post the job free and let them come to you.

Keep the filters and burners on a schedule

Wash the hood’s grease filters every 3–4 weeks and wipe the burner parts whenever they boil over. Replace carbon filters when smells start to linger.

Get gas appliances checked

A gas hob or cooker should be serviced by a Registered Gas Installer as the maker recommends. Fit a carbon monoxide alarm in any room with a gas appliance.

Dispose of old appliances and filters properly

Used carbon and grease filters go in the general waste. An old oven, hob or hood is electrical waste: the shop selling you a new one must take the old one back free like-for-like, and civic amenity sites and recycling centres take household electrical waste free — mywaste.ie lists the drop-off points.

Write down your oven’s offset

Note what the thermometer told you on a sticker inside a cupboard door, so you set the oven right every time.

Fixing an oven, hob or cooker hood that is not working properly: questions people ask

Check the clock is set after a power cut, the child lock and timers are off, and demo mode is not switched on — any of those can leave the elements cold. Then check the cooker switch and the fuse board. If it still stays cold, it is a technician’s job.

Spare trays blocking the air, the wrong shelf, too high a temperature, or a door seal that has slipped. Take out unused trays, follow the cooking chart, try 10–20 °C lower for longer, and reseat the door and seal.

You can clean and reseat the removable burner caps, crowns and pan supports. Anything below them — injectors, gas taps, the flame-failure device, the pipework or connecting the hob — is gas work, which only a Registered Gas Installer may do.

One maker suggests washing the metal grease filters every 3–4 weeks, in a dishwasher on a programme no hotter than 65 °C. Left for 3–4 months, the grease can harden for good.

A plug-in oven, yes, once it is cool and switched off. A cooker hard-wired to a cooker switch is part of the fixed wiring, and a gas cooker’s connection is gas work — call a Registered Electrical Contractor or a Registered Gas Installer.

On the Locufy price guide for Ireland a repair costs €70–€260 per repair, typically €120. The low end is a call-out and a seal or a setting; the high end is an element, fan motor or control board.

MORE GUIDES

More DIY guides

Deep-cleaning an oven by handFixing a fridge freezer that is not cold enough or icing upFixing a dishwasher that will not drain, fill or cleanFixing a washing machine that will not drain, fill or spinRegrouting tilesPainting a roomHanging wallpaperSpray painting small items with aerosol paint
All 90 DIY guides →How to hire an appliance engineer →Appliance Repair price guide →Appliance engineers on Locufy →

Sources — checked October 2026

  1. Miele Ireland — cooker hood performance decreased: grease filters at a maximum of 65 °C every 3–4 weeks
  2. Miele Ireland — oven: food top unevenly browned, 10–20 °C lower, shelf level, accessories, door seal
  3. Miele Ireland — oven: light at front, dark at back; silicone and fibreglass door seals
  4. HSA — electricity
  5. CRU — RGI and Safe Electric schemes
  6. RGI — Registered Gas Installers, gas emergency 1800 205050
  7. Irish Statute Book — S.I. No. 264/2013, Restricted Electrical Works Regulations
  8. MyWaste — WEEE help and FAQs: free like-for-like retailer take-back and civic amenity sites
  9. diy.ie — oven cleaners, price check October 2026
  10. diy.ie — cooker hood carbon filters, price check October 2026