Testing a heating element and thermal probe in an oven involves a few steps to determine if they are functioning properly. Before you begin, make sure to unplug the oven or turn off the power to ensure safety.
Here's how to test them:
Heating Element (Bake or Broil Element):
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Visually inspect the heating element for any visible damage like cracks, breaks, or blistering. If you see any, it's likely the element needs replacement.
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Use a multimeter to test the resistance of the heating element. The resistance should measure between 19-110 ohms.
Thermal Probe (Temperature Sensor):
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The thermal probe, also known as a temperature sensor, is a small metal rod usually located inside the oven cavity.
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Disconnect the probe from the oven control board if possible. It is typically a two-wire connection. Check for any visible damage to the wires or connectors.
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Use a multimeter to test the resistance of the thermal probe. Set the multimeter to the "Ohms" setting. A functioning thermal probe typically has a resistance of around 1000-1100 ohms at room temperature. However, consult your oven's manual or manufacturer's specifications for the exact resistance value required for your specific model.
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Place the multimeter probes on the two wires from the thermal probe. The resistance reading should be relatively close to the expected value. If it's significantly different or shows an open circuit, the probe may need replacement.
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Reconnect the thermal probe to the oven control board if disconnected during the test.
Recommendation
If you're uncertain about the results or if you're still experiencing issues with your oven, it's a good idea to consult the oven's user manual for specific testing instructions and resistance values, as they can vary by model and manufacturer. Additionally, if you're not comfortable with electrical testing, it's best to seek the assistance of a professional appliance repair technician to diagnose and fix the issue with your oven.