Why Is My Oven Temperature Wrong?
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An oven that runs significantly hotter or cooler than the set temperature makes reliable cooking impossible. The two main causes are a faulty thermostat and a faulty temperature sensor.
Thermostat Fault
The thermostat monitors and controls the oven temperature. When it fails, the oven may overshoot or undershoot its target temperature. Replacing the thermostat typically costs £100–£160.
Temperature Sensor Fault
Modern ovens use an electronic temperature probe rather than a mechanical thermostat. A faulty probe sends incorrect readings to the control board. Cost: £80–£120.
Can I Test My Oven Temperature?
Yes — an oven thermometer (available for under £10) can confirm whether your oven runs hot or cold. If it's 20°C or more off, a repair is warranted.
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