Few kitchen disasters feel worse than discovering your oven won't heat mid-dinner prep. You've preheated. The display shows the right temperature. Your roast sits cold inside… but nothing happens.
Before you order takeaway or make a call to a technician, run through this checklist first. Many common oven issues that we’ve seen at National Appliance Repair actually don’t require an electrician at all!
Common Reasons Why Your Oven Isn’t Heating Properly
There are two types of ovens: electric and gas. Electric ovens use heating elements -- that’s the coil that glows red hot when you crank up the temperature dial. Gas ovens need an igniter to light a burner, which in turn provides the heat. Both need electricity (yes, even gas ovens) to work.
Disclaimer: Before you begin, make sure to unplug the oven before you do any of the steps below!The Quick Fix: Check Your Breaker
Your first stop should be the circuit breaker panel. Ovens pull serious power -- a surge can trip the breaker protecting that circuit instantly. Power cuts off completely when this happens.
What to do:
- Locate the panel
- Find the switch labeled "Oven" (or your kitchen area)
- If it sits midway between On and Off, it's tripped
- Switch it to Off, then to On
If the breaker trips again within days? Call an electrician -- there’s a fault going on in your electrical system. Keep flipping it, and you risk fire or injury.
Temperature Sensor Issues (The Weird Heating)
Inside your oven runs a thin tube along the back wall. This temperature sensor tells your oven when cooking temperature has been reached so it can reduce heat. If this tube touches the oven wall or gets damaged, it may return wrong readings and your oven’s temperature goes haywire. That’s how, even with correct settings, you end up with either undercooked or burned food. Temperature may also swing wildly during a single cycle.
Sometimes, the sensor gets bumped while you’re loading dishes. In that case, just carefully bend it back to a 90-degree angle from the back wall. You can try running a cycle afterward and see if your oven’s fixed.
If, instead of a bent sensor, you see a cracked, visibly burned, or clearly damaged sensor, that constitutes an actual pro-level repair. Give us a call and we’ll be right over.
Failed Heating Elements (Electric Ovens)
This typically applies to electric ovens. Most models have two heating elements: one at the bottom for baking, one at the top for grilling. Like most things, these wear out over time. Eventually, they’ll burn through and fail to heat up completely. When one of these units dies, your oven either won’t heat or only partially heats.
You’ll want to look for:
- Visible cracks, blisters, or burn marks on the coils
- One element glowing when you switch it on, the other staying dark
- Slow heating. Inconsistent heating across the oven.
The element itself costs $50-$100. Labour gets added on top.
For a technician, this is straightforward work. For you, it involves electrical connections, so it’s best to skip the DIY attempt (even if there are tutorials on YouTube showing you how -- it’s just not worth it.)
Gas Igniter Problems
Gas ovens need a spark to light. The igniter is a small ceramic or metal part that glows white-hot to ignite gas. When it fails, you hear clicking sounds but no actual ignition.
You’ll want to watch for:
- Clicking but no flame
- Weak or delayed flame
- No ignition attempt at all
Grease and buildup sometimes block the igniter. When that happens, you can take a gentle brush and clear out the debris. You can also use a needle to clear the pilot hole -- sometimes detritus and soot can collect and clog it up. But if the igniter is cracked, corroded, or worn, then replacement is necessary. That’s a professional job.
Control Board Failures
Modern ovens have digital control boards managing temperature, timing, and safety functions. If this board dies, the oven won't respond to commands even if other parts work fine.
Some signs of this are:
- Control panel lights don't respond
- Display shows error codes
- Buttons click with no reaction
A failed board is obviously a specialist’s work. You’ll need someone to diagnose precisely what’s broken and, if needed, replace the board.
Simple Checks Before You Call Anyone
Pull out your manual (if you don’t, most manufacturers have an online version of their manual that you can read by searching the model name and the keyword “manual PDF” on Google). You’ll want to look for sections on "Demo Mode" or "Control Lock" settings.
Newer models sometimes have features that limit functionality if accidentally triggered. Try to hold the lock button for three seconds -- it might fix your oven.
Also confirm:
- Your oven is actually plugged in (more common than you'd think)
- Gas valve is turned on at the wall supply if you’re using a gas oven
- Knobs weren't put back incorrectly after cleaning
Frequently Asked Questions (FAQs)
The breaker keeps tripping. Can I just keep resetting it?
No. A tripping breaker that won't stay on is telling you something's wrong electrically -- short circuit or an overload. It’s best to call an electrician.
What's a heating element replacement actually cost?
A heating element typically runs for anywhere from $50-$100. Labour adds another $100-$150 or so. You’re looking at a $200-$250 job, total. This still beats buying a new oven at $800+.
Is a bent temperature sensor bad?
It won’t hurt you. But your oven will cook inconsistently -- some things burn, others come out raw.
My display is showing an error code, what do I do?
Check your manual first -- each brand uses different codes. If you can’t find it, Google "[Brand] [Model] [Error Code]" and dig through the manufacturer's support pages or user forums. Most people have already asked the same question. If you're still lost, text a technician the code.
The oven is taking forever to heat up, what’s going on?
Your heating elements are probably aging or needing calibration. Not an emergency, but it's wearing out. Repair’s a good option if the appliance is under 10 years old, but if it’s not, think of getting a replacement.
Getting Help
If basic troubleshooting doesn't work, it’s time to call us!
National Appliance Repairs services Melbourne, Sydney, Brisbane, Perth, and Adelaide with same-day availability across most suburbs. Our technicians work on all major brands -- Bosch, Fisher & Paykel, Miele, Electrolux, Samsung, and many others.
Every repair comes with a 12-month warranty on parts and 3-month warranty on labour. If we carry the part in our van, you get an instant quote and same-day repair. For parts we need to order, we provide a written quote first.
