Why does the fan run on for so long after the oven is switched off?

A lot of electric fan ovens run the fan until the oven cools. This ventilated the cavity.

sounds like a welded relay...

Some ovens fan will run too cool oven down when oven is switched off

Without knowing the make and model, this is a guess, the fans usually run for some time after switch off, to allow cooling I am guessing this carries on until you isolate the mains. If so you have a thermostat problem. It would be easier to de-fine if there were more information.

Regards
John

The timer that runs the mag is stuck. Unplug fan for 30 seconds and check it out. If not fixed, then look at replacing if microwave is older 7-8 years old.

Hi Maurice.

Circulating is Fan Assisted mode. In this mode the fan kicks in when temperature is reached and runs all the time.

Here an extract from manual.




There is no preheat unless you set temperature. That is why you get the fan from start.

When you turn the bottom oven on, does the fan start to run in the oven? Do the oven lights come on? Does the main cooling fan switch on? Does the oven control knob illuminate? Does the thermostat neon illuminate?
As a guide, the power/control for the bottom oven is via the main switch on the front panel. Power then goes from the switch through the thermostat to the the oven/element/fan. The lights go direct from the switch.
I hope this helps.

Cooking is determined by 3 things so let's look at what they are and what they do.

They are:

1. 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.
2. 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.
3. 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!

oven has two fans. the second fan is out of sight and cools the casing. it is operated by a seperate stat. not unusual for it to run for up tohalf hour after switching off. if it runs for an excessive time may be a fault nwith fan stat

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.