We dont have a manual for the cooker and dont know how to turn the fan of.

Indicative of a failed element. Remove the contact leads and test with a meter.

Appears to be a Polish brand?

Amica Cooker & Oven Parts ' BuySpares

www.buyspares.com > amica > cooker-oven > catalogue

Repair your Amica Cooker & Oven appliance with a part from our extensive parts range. All our Amica Cooker & Oven parts are available to buy online. Missing: AS9EGS ‎' Must include: AS9EGS

Spare parts : Amica

www.amica.pl > Amica.pl > Support

Are you looking for spare parts or accessories for household appliances? Take a look at our store! By taking the next step towards the development of user ... Missing: AS9EGS ‎' Must include: AS9EGS

INSTRUCTION MANUAL - Amica

www.amica-international.co.uk > connector > downloads

PDF Do not use the oven until you have read this instruction manual. ... Warning: The appliance and its accessible parts ... Replacement of the oven light bulb. Missing: AS9EGS ‎' Must include: AS9EGS

Amica Cooker & Built In Oven Spare Parts - UK Whitegoods

shop.ukwhitegoods.co.uk > amica-oven-cooker-spare-p...

Spares for Amica built in ovens, cookers and hobs including elements, both fan and oven as well as fan motors, door parts etc. If you can't find the Amica spares ... Missing: AS9EGS ‎' Must include: AS9EGS

Amica Cooking Appliance Parts & Accessories for sale ' eBay

www.ebay.com > Amica-Cooking-Appliance-Parts-Acc...

Results 1 - 36 of 36 - Amica Cooking Appliance Parts & Accessories ... Genuine Amica 507EE1.30HPFGW Cooker Oven Hob Knob 9051787 - White. $30.22.

Lots of spares available online.

https://www.google.com/search?q=spare+parts+for+an+Amica+oven+AS9EGS&rlz=1C1QJDB_enCA643CA644

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sounds like a welded relay...

Sounds like the cooling fan bearings are worn, hence the noise after you turn the cooker off.This fan is in the top of the oven and helps to keep the inside cooker electrics cool and often keeps going for a while after you have turned the cooker off. Best to call an engineer to check this out for you!

goto (http://www.smeg.com/) click on services

The 3 knobs each have 6 positions corresponding to clock-face positions 2,4,5,7,8,10 o'clock.

Left - Grill Temperature 1-6. (Note Oven Temp needs to also be turned on before grill will work.)

Centre - Function
1 - Lamp
2 - Defrost (fan only)
3 - Fan Assisted Oven
4 - Grill
5 - Grill with Fan
6 - Fan & Bottom Element

Right - Oven Temp 50,100,150,200,250,Max (celsius)

The element has blown. It will cost you around

try this site for your manual
kitchen.manualsonline.com/manuals/.../creda/creda_oven_product_list.html

hope this helps

Ok , classic example of a fan oven element blowing, take the cover off inside the cooker held on by 4 screws so you can see the round element, you should be able to see where its blown a big hole.
replace element
( make the cooker is turned off of course)