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...
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.
Jan 01, 2011 |