If your oven is not heating properly, cooking becomes slow, uneven, and unreliable. This issue affects both electric and gas models. Some causes are minor. Others require professional repair.
Knowing the likely fault helps you avoid unnecessary replacement and understand realistic repair costs.
Common reasons your oven is not heating properly
Faulty heating element
In electric ovens, the heating element produces the heat. When it starts failing, it may still warm slightly but never reach the correct temperature. You may notice long preheat times or uneven cooking.
Typical repair cost ranges from £90 to £200.
Broken thermostat
The thermostat regulates temperature. When it fails, the oven may underheat or overheat. Food can burn on the outside while remaining undercooked inside.
Thermostat replacement usually costs £100 to £220.
Defective temperature sensor
Modern ovens often use a sensor instead of a traditional thermostat. If it sends incorrect data, the oven cannot regulate heat correctly.
Sensor replacement often costs £90 to £180.
Gas oven ignition issues
In gas ovens, weak ignition or blocked burners can prevent full heat output. This causes inconsistent heating or no heat at all.
Gas ignition repairs typically range from £120 to £250.
Control board faults
The control board manages heating signals. When it fails, the oven may heat erratically or not at all.
Control board repairs usually cost £150 to £350.
Signs your oven needs professional repair
- Long preheat times
- Uneven cooking
- Incorrect temperatures
- Oven turns on but does not heat
- Burning smells or sparks
Can I fix this myself
Basic cleaning and bulb replacement are safe. Heating elements, sensors, and gas components should only be handled by qualified engineers.
Is it worth repairing
Most heating faults are cheaper to repair than replace. If your oven is under 10 years old, repair is usually the better choice.
You can compare options in our guide on old cooker repair vs replacement cost.
Related problems
Get a repair quote
If your oven is not heating properly, professional diagnosis is the safest option.
Visit our homepage to get free repair quotes today.