Oven Not Heating? Causes, Symptoms and How to Fix It
Oven Not Heating? Introduction
Oven not heating up, and a roast in the tin? It’s a right nuisance, but the cause is usually one of a handful of faults, and a few take two minutes to rule out. This guide shows you how to work out what’s gone wrong, which checks are safe to do yourself and when to call an engineer. We repair ovens across London and Essex, so if yours is still on the blink after the checks, we’ll sort it.
Oven Not Heating? The Quick Answer
An oven that won’t heat is usually down to a faulty heating element, a failing thermostat or temperature sensor, or a power or control fault. Elements fail most often. Fan ovens can also lose the fan element at the back, and gas ovens can have ignition or flame-supervision faults.
Oven Not Heating? Match Your Symptom to the Likely Cause
How Your Oven Heats Up (30-Second Guide)
Knowing the parts helps you spot the fault:
Heating elements are the glowing metal bars. Most ovens have a bottom (bake) element and a top (grill) element, and fan ovens add a ring element around the back fan.
The thermostat or temperature sensor reads the heat inside and switches the element on and off to hold your set temperature.
The control board or timer takes your settings and tells the oven what to do.
The fan (in fan ovens) moves hot air around so food cooks evenly.
If any one of these fails, the oven can stay cold, heat slowly or cook unevenly.
Oven Not Heating Up? Check These 5 Things First
Switch the oven off at the isolator before you touch anything inside.
Check the power. Look at the cooker switch (the isolator) on the wall and check your fuse box for a tripped breaker. A dead display is a big clue.
Check the clock and timer. Many ovens won’t heat if the timer’s set to auto, or if the clock’s flashing after a power cut. Reset it to manual. Some models also have a child lock.
Try another mode. Does the grill work? Does the fan mode work? A function that heats while another doesn’t tells you which part has failed.
Look at the element. With the oven cold and off, check for cracks, blisters or a burnt patch on the bottom and top elements. Damage means the element’s probably gone.
Check the door. A bent hinge, loose latch or worn seal lets the heat escape. If yours won’t close, read our guide to an oven door that won’t close properly.
Check the temperature. Put an oven thermometer inside, set the oven to 180°C and check after 20 minutes. If it’s miles off, the thermostat or sensor is the likely culprit.
Oven Not Heating: 6 Common Causes Explained
1. Faulty heating element
Elements wear out with heat and age. A failed one won’t glow when the oven’s on. This is the most common cause, and an engineer can usually replace it in one visit.
2. Broken thermostat
The thermostat tells the oven when to heat. If it fails, you can get no heat, too much heat or wild swings. Find out more in our guide to spotting a faulty oven thermostat.
3. Failing temperature sensor
A worn sensor sends the wrong readings to the control board. The oven then under-heats, overheats or cuts out early.
4. Fan element or fan motor fault (fan ovens)
The ring element behind the fan can burn out while the fan keeps spinning. If the fan oven’s cold but conventional mode heats, this is the likely cause.
5. Electrical fault or tripping fuse
If the oven trips the breaker, stop using it. It points to a shorted element or wiring fault. Our guide to an electric oven tripping the electricity explains why. If it won’t turn on at all, see oven not turning on: what could be wrong.
6. Control board, timer or door lock fault
A glitchy display, unresponsive buttons or a faulty door lock can stop the oven heating. Self-cleaning (pyrolytic) ovens in particular may refuse to heat if the door lock fails.
Gas Oven Not Heating? Read This First
Gas ovens have extra faults: a blocked burner, a faulty igniter, or a flame-supervision device that cuts the gas. Gas work must be done by a Gas Safe registered engineer, so don’t try to fix it yourself.
If you smell gas, or see a yellow or orange flame or black soot: turn the oven off, open the windows, don’t use switches or naked flames and call the National Gas Emergency Service on 0800 111 999.
Can You Fix an Oven That’s Not Heating Yourself?
Safe to do: checking the isolator and fuse box, resetting the clock or timer, checking the door and seal, and using an oven thermometer.
Leave to an engineer: replacing elements, thermostats, sensors or control boards, and anything on a gas oven. Ovens run on mains power, and a bodged repair can cause a fire or electric shock.
Oven Repair in London and Essex
Don’t fancy a faff? Our DBS-checked engineers repair electric and gas ovens and cookers across London and Essex. Here’s how it works:
We find the fault. Your engineer tests the power, elements, thermostat, sensor and controls.
You see the price first. We quote the repair before any work starts.
We fix and test it. Most repairs happen on the spot, and we test the oven before we leave.
You’re covered. Every repair carries a 90-day guarantee for the same fault.
Oven repair and cooker repair across London and Essex
We offer same-day and next-day visits where available, plus weekends and bank holidays.
Oven Not Heating: Repair or Replace?
Fixing’s usually the better option for elements, thermostats and sensors, and it keeps a good appliance out of landfill. Think about replacing if:
the oven’s very old and keeps breaking down
the repair would cost close to a new one
the control board’s failed on an older model
Your engineer will give you straight advice. If you do need a new one, we can supply a new oven, install it and take the old one away.
How to Stop Your Oven Breaking Down Again
Wipe up spills before they bake onto elements and seals.
Don’t slam the door, because hinges and seals wear quickly.
Don’t line the oven floor with foil, as it can trap heat and damage the element.
Use the self-clean cycle sparingly, since the high heat stresses parts.
Get unusual smells, noises or slow heat-ups checked early.
Oven Not Heating: FAQs
Why is my oven not heating up properly?
Most often it’s a faulty heating element, thermostat or temperature sensor. A tripped fuse, a timer set to auto or a bad door seal can also stop it heating.
Why is my oven on but not getting hot?
The element has probably failed, or the thermostat isn’t telling it to heat. Check the element for cracks or blisters.
Why does my grill work but not my oven?
The bottom (bake) element or the thermostat has most likely failed, because the grill uses a separate element.
Why is my fan oven not heating?
The fan element at the back may have burnt out. If conventional mode works but fan mode doesn’t, that’s the likely cause.
Why is my gas oven not heating?
It could be an ignition, burner or gas supply fault. Gas faults need a Gas Safe registered engineer. If you smell gas, call 0800 111 999.
How do I know if my oven thermostat is faulty?
If the temperature’s way off what you set, or it swings up and down, the thermostat or sensor is the likely cause. An oven thermometer helps confirm it.
Can I use an oven that isn’t heating properly?
It’s best not to, especially if it trips the electrics or smells of gas. It’s also a food safety risk if food isn’t cooked through.
Do you repair ovens near me?
We cover London and Essex. Enter your postcode on our site to check your area.