Statewide Appliance Spares Blog

Warning signs your oven is failing (and what to do)

Your oven is one of the hardest-working appliances in your kitchen—roasting, baking, grilling, and getting you through everything from Tuesday night pasta to Christmas lunch. Some issues are minor annoyances. Others are serious warning signs your oven is failing. Here’s what to watch out for.

1. Gas smell or burning odour

Warning sign

A persistent burning smell while cooking or a gas smell when you turn on your oven.

Why it matters

A gas smell may indicate a leak, which is a serious safety issue. A burning smell can suggest electrical problems or damaged insulation—both potential fire hazards.

What to do

  • If you smell gas: turn off the oven immediately, open windows, avoid using electrical switches, and call your gas provider or a licensed gas fitter straight away.
  • If you smell burning: switch the oven off and don’t use it until it’s been checked by a professional.

Don’t ignore it

Gas leaks and electrical fires are serious. Get expert help immediately.

2. Uneven or inconsistent cooking

Warning sign

Your oven used to cook evenly, but now one side burns while the other stays raw, or baking times are inconsistent.

Why it matters

This often points to a failing heating element, a faulty thermostat, or (in fan-forced ovens) a fan that isn’t working correctly.

What to do

  • Check whether both heating elements glow evenly when the oven is on.
  • If an element looks dim or doesn’t glow, it may need replacing.
  • Use an oven thermometer to test whether the actual temperature matches the setting.

Parts you might need: Oven heating elements, Oven thermostat, Oven fan

DIY or call a pro?

Heating element replacement is often a straightforward DIY repair. Thermostat and fan motor issues are best handled by a technician.

3. Oven won’t heat up

Warning sign

Your oven takes ages to reach temperature, or won’t heat up at all.

Why it matters

This usually means a heating element has failed, or there’s an issue with the thermostat, temperature sensor, or control board.

Faulty oven heating element

What to do

Turn the oven on and check whether the heating elements glow bright orange. If they don’t glow, the element may have failed.

Once the oven is completely cool, inspect the element for blisters, cracks, splits, or small holes—these are clear signs it needs replacing.

If the element glows normally but the oven still won’t heat correctly or maintain temperature, the thermostat or temperature sensor may be the issue.

Parts you might need: Oven heating elements, Oven thermostat, Gas oven igniters

DIY or call a pro?

Heating elements are often a DIY job, but always switch power off at the switchboard before starting any work. If unsure, call a qualified electrician.

4. Door won’t close tightly

Warning sign

The oven door won’t close completely, feels loose, or you can feel heat escaping around the edges.

Why it matters

A faulty door seal allows heat to escape, which can cause uneven cooking and higher power bills.

What to do

  • Inspect the door seal (gasket) for cracks, tears, or flattening.
  • Check hinges for looseness or bending.
  • Replace worn seals or damaged hinges.

Parts you might need: Oven door seals, Oven door hinges

DIY or call a pro?

This is usually an easy DIY fix. 

Check out our guide: How to replace your oven door seal in 4 easy steps

5. Oven door glass is cracked or shattered

Warning sign

The glass in your oven door has cracked or shattered.

Why it matters

Cracked glass is a safety hazard and can shatter during use.

What to do

Stop using the oven immediately if the glass is cracked or broken. Replace the oven door glass as soon as possible.

Parts you might need: Oven doors and glass

DIY or call a pro?

Confident DIYers can tackle this, but it can be fiddly.

6. Error codes or control panel malfunctions

Warning sign

Your oven displays error codes, the control panel buttons don’t respond, or the display is blank or flickering.

Why it matters

This typically indicates an electrical fault or a failing control board (PCB).

What to do

  • Check your oven manual to identify what the error code means.
  • Try resetting the oven at the circuit breaker.
  • If the issue persists, the control board may need replacing.

Parts you might need: Oven PCBs

DIY or call a pro?

Control boards involve electrical work—best handled by a professional.

7. Oven light won’t turn on

Warning sign

The oven light doesn’t turn on when you open the door or switch the oven on.

Why it matters

It’s not usually a major safety issue, but it makes it harder to check cooking progress without opening the door and losing heat.

What to do

  • Replace the globe first.
  • If that doesn’t fix it, the light socket or wiring may be faulty.

Parts you might need: Oven globes

DIY or call a pro?

Replacing the globe is easy. If the socket or wiring is faulty, you may need a technician.

Check out our guide: How to change an oven globe

8. Loud or unusual noises

Warning sign

Your oven is making loud humming, rattling, grinding, or clicking noises that weren’t there before.

Why it matters

Unusual noises often mean the fan motor is failing (fan-forced ovens) or there’s a loose component.

What to do

  • Try to identify if the noise is coming from the fan area.
  • Check for loose panels or screws (only when oven is off and cool).
  • If the noise persists, the fan motor or blade may need replacing.

Parts you might need: Oven fan, Oven motor

DIY or call a pro?

Experienced DIYers may handle this. If in doubt, call a professional.

DIY repairs you can tackle

  • Oven globe replacement
  • Door seal replacement
  • Heating element replacement (if confident)
  • Cleaning and minor maintenance

When to call in the experts

  • Anything involving gas connections or gas smells
  • Electrical faults (sparking, smoking, control board issues)
  • Thermostat replacement
  • Fan motor replacement
  • Self-cleaning mechanism repairs

Should you repair or replace?

Time to replace when

  • Your oven is 15+ years old and repairs cost more than half the price of a new oven.
  • Multiple major parts are failing at once.
  • The oven cavity or structure is damaged.
  • You’ve had several expensive repairs recently.

Repair makes sense when

  • It’s under 15 years old and replacement parts are still available.
  • Only one component needs replacing.
  • The repair costs under $400–$500.

Safety first

  • Switch off the oven at the power point and at the switchboard.
  • For gas ovens, turn off the gas supply.
  • Let the oven cool completely before touching anything.
  • Place towels or newspaper down to protect your floor.
  • Take photos before disconnecting anything.

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