⚠️ SAFETY FIRST: IMPORTANT
Electricity can be lethal. Before attempting any repair, ensure the appliance is fully isolated from the mains power. If you are not confident using a multimeter or working with high-voltage components, consult a qualified engineer. Never work on a "live" circuit.
Is your oven playing games with your recipes? A faulty thermostat is the most common reason for an oven that either won't heat up at all or won't stop heating until your dinner is charred. Testing it is simpler than you think, though getting to it often requires removing the hob top.
The Access Challenge
On most cookers, the thermostat is tucked behind the control panel. To get there:
Safety First: Ensure the power is isolated at the wall.
Remove the Hob: Undo the rear brackets and front retaining screws to lift the hob top off.
Panel Removal: You may need to remove the control knobs and the panel switches to fully expose the thermostat unit.
The Continuity Test
Once you’ve located the thermostat and identified the wires leading to the element:
The Multimeter Setting: Set your meter to Ohms/Continuity.
The "Off" Test: With the thermostat turned to the "Off" position, your meter should read OL (Open Loop). This means the circuit is broken, as it should be.
The "On" Test: Click the thermostat "On." You should immediately see a low Ohm reading (continuity). This proves the internal switch is closing and allowing power to reach the element.
The Failure: If you get OL even when the thermostat is turned "On," the internal contacts have burnt out. It's time for a replacement.
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