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We have a fan oven, which started not heating, but fan and thermostat light still on! We thought it was the element! But now the oven is working very occasionally, still heating as normal! We can try to use the oven again in a few hours and no heat, just the fan and thermostat light! Any ideas of the problem? Thanks

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Hi,

Elements don't heat intermittently - if the element is good it will heat up every time. If the element is blown / burnt-out it wont ever heat.

As your oven is heating sometimes but not others, this means the power supply to the element has an interruption somewhere. This could be caused by any of the following:

1. Loose connection in the wiring at the switch or the element
2. Faulty switch
3. Faulty thermostat.
4. Faulty oven timer

The thermostat is effectively just a heat-sensitive switch. By default it should be "closed" allowing power to the element. When the oven reaches the desired temperature, this switch opens, cutting power to the element until the oven cools enough for the switch to close and allow power to the element again.

Any of these four could be the cause of your fault. Loose connections can often by located visually, however testing a thermostat for correct operation and calibration is more complicated and ideally requires test equipment. The timer is the least likely cause, so I would concentrate on the others first.

Repairing your oven or any other electrical appliance can be dangerous and many repairs require specialist knowledge and/or electrical test equipment. Please bear this in mind before and when attempting any repair or consider having your appliance professionally inspected.

If you are intending to investigate this problem yourself, please ensure the power is disconnected at the wall/breaker first. Initially, I suggest that you visually check the connections at the element and the switch. You may find a wire at one of these locations that is partially broken or detached. Personally, I suspect your thermostat may be faulty.

Hope this helps.

Regards,
BElectric


Posted on Jan 01, 2011

  • DILLIGAF
    DILLIGAF Jan 01, 2011

    Having thought about this a little more, I suspect the problem is a loose/bad connection in the wiring at the element or the switch or a faulty oven switch. If it was a timer fault, the fan and thermostat indicator light would not run so you can exclude this. Similarly, if the thermostat indicator light is illuminating when you switch the oven on, this means that the thermostat is correctly in the default closed postion at cold start. The essential thing which seems to be missing is power to the element which indicates a switch or wiring fault. There is also a small chance that the element itself is faulty. This would need to be tested for continuity/resistance using an ohm/multi-meter - assuming you have one or can borrow one and can gain access for testing.

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