When the temperature is set (any temperature) and the time is set the oven switches itself off after 20 minutes. The element,fan and light stop working although the 'Power' light remains on? it does not switch back on.
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My name is Peter. I am a retired field service appliance technician.
You may not have a problem. Normally your oven will rise about 40 degrees F. above the set temperature and then shut down, until the oven temperature falls 40 degrees F. below the set temperature, then the oven turns back on.
Your oven temperature is controlled by you oven thermocouple.
You also have a high temperature limit switch, which turns the fan on when you go too far above the set temperature to vent the oven. This may be bad.
From my experience the most common reason for this failure is a thermal switch for cooling fan. It is located on the upper side between the wiring and its function is to switch off the cooling fan when the temperature drops even though the oven is already turned off. If the cooling fan does not work then it will increase the temperature on the cabinet and the main temperature limiter will switch off the oven.
When you say it goes up and down by itself, what is the neon doing on the front panel. Is this switching off and on in relation to the oven heating and cooling? If it is, then it could be the thermostat sensor is dirty/covered in grease etc and giving false readings and will need a carful clean. With a fan oven, the fan should keep running, it is the element that the thermostat controls. If the neon stays on but the temperature varies, it could be a fault with the wiring. Does the fan keep running?
There does seem to be a fault, as the fan should run continuously even when the element goes off at the required temperature setting, and the light should atay on as well.
It suggests to me that there is a fault with the oven thermostat, or it is wired incorrectly.
Oven temp exceeds 590 w/ unlocked door
High resistance or interference in oven temperature sensor. Replace oven temperature sensor
F2 Note: Also see fan thermal switches
Indicates that oven is over temperature in one of the following modes within either a cooking or clean mode of operation. · Control senses oven temperature above 650 degrees F with the door circuit in the unlock mode. · Control senses oven temperature above 935 degrees F with the door in the locked mode. · Stalled cooling fan or airflow problem.
· Look for welded relay contacts. (Heating elements on in off mode). · Look for open thermal switch in lock motor circuit. Switch is normally closed and will open if area overheats due to fan not operating. Look for cause - fan thermal switch not closing, fan stalled, etc. · Look for high resistance in the oven temperature sensor circuit due to high contact resistance (poor terminal crimp, deformed terminals, loose connection) or intermittent solder joint on control or intermittent oven temperature sensor. · Look for electrical noise interference in the oven temperature sensor circuit (Ham radio, cordless phone, etc.).
Make certain that the heating element is properly seated WHEN THE OVEN IS COLD! When you put "current" through wires and heating elements, they vibrate. Zip tie the wires together outside the oven cavity.
the electric went off wasnt sure why at the time but when i reset the trip fuse my oven stopped heating up so somethingobviously blew in the oven to cause the the elctrics to trip,
does anyone know how to replace the heating element, also the fan on the top isnt working either
Cooking is determined by 3 things so let's look at what they are and what they do.
The Fan Oven Element - This is very much the same as a light bulb only instead of giving off light it gives off heat. Like a light that is switched On or Off by a wall switch, the Element is switched On or Off by a Thermostat according to the temperature required. In short if the element fails your oven will be cold.
The Fan & Motor - This sucks the air in through the centre mesh and circulates it around the Element and pushes the heated air out of the top, bottom and sides of the back-plate. Fan ovens cannot heat properly if the fan is not running OR if the fan runs too slowly as the motor starts to fail.
The Thermostat. - This is basically an On/Off Switch that responds to the temperature in the oven. If The Fan is running correctly and you are achieving some temperature in the oven, then the fault will be with the Thermostat.
I hope this Helps - Terry
ALWAYS ISOLATE THE POWER SUPPLY BEFORE WORKING ON THEI APPLIANCE!
We have the same problem with our oven, AEG B2190-1.It started on on Christmas day[worst day of year]gets up to temperature after 10-15 minutes cuts out everything switches off until the oven has cooled down, The oven is only 18 months old. We have been told that it is a thermostat problem.
I sorted it it is a simple solution, if you take the top of your oven you should see the problem...it will be big and black..dont spend a ortune getting it sorted i brought the part off ebay for less than a fiver..
just cant remember what it was called..very simple to fix though.