Oven thermostat replacement

So last night the main oven decided to trip the fuse when I adjusted the temp.
Turned it all back on and I thought it was working again.

20 mins later I checked the food, stone cold oven

Clearly the Thermostat has gone. It is a John Lewis oven and is about 7 years old.
I think AEG are the manufacturers of these and looking online (before pulling it out) the part will cost me about £30

Question is, how easy is it to replace? Could it be something else? The grill in the top oven still works, not sure about the top oven we never use it because it takes an age to heat up.

Here is a demo on how to replace the thermostat m8. Remember disconnect it from the mains first. [video]https://youtu.be/vTFbYfeIIeg[/video]. The tube could be damaged or indeed the thermostat itself.

Official AEG Site: Cooker, Oven & Hob Thermostats

it also might be the element in the main oven thats faulty.if you've got a meter then you can check this also.

I would agree with coathanger
generally a thermostat only operates some kind of switch arrangement, for this to trip your electrics sounds like it could be the element blowing ??

I would cerainly get the element checked first.

smoggie said:

I would agree with coathanger
generally a thermostat only operates some kind of switch arrangement, for this to trip your electrics sounds like it could be the element blowing ??

I would cerainly get the element checked first.

Click to expand...

The thermostat activates the element and indeed controls the heat going to the element. If the element is not getting warm or not warm enough it could be the fan, the thermostat or indeed the element. May I suggest that you perhaps take the element out of the top oven and install it in the bottom one. if the same symptoms persist it is indeed the thermostat and not the element. If all works fine with the new element then get a new one for the bottom oven.

Yep, I think I jumped to the conclusion that the Thermostat was to blame.
Either way I am going to have to pull the oven out to fix it, but should not cost too much.

As a qualified spark i would not just put the element in the bottom from the top as they are not always the same(may look the same but could be very diff), what you want to do is get a multimeter and test the Resistance of the heating elements and the thermostat this will tell what part you need to change, make sure you have disconnected the power supply to the cooker before doing anything, usually its down to the element and seven years is not a bad run for one.

Do please keep us all informed of the outcome of this fault I am getting curious now.

I will, I am going to take the element out tonight.
Last night was Beer night

I'm with @livo. As well as checking the resistance of the element check resistance to the element casing. You should get high values for this.

Also check the element casing for blisters as they often deform near the site of the fault.

No update yet folks, going to take it out and test it tomorrow.

Took it out earlier, looks like something gone wrong with it. Nothing when I tested it on the meter so I have ordered a replacement from Amazon prime for £7 that comes tomorrow.

Hopefully it will be a 5 min job and all working.

Funnily enough one of my grill elements blew yesterday, ordered a pair from Amazon myself, should be here middle of the week

So,

Yesterday morning before I set off to Wembley (not happy today), I whacked the new element in.

Straight forward, did a test... nothing...
previously when turning the thermostat the light would come on to suggest it was heating... Now nothing is happening?

What could I have broken? The thermostat maybe? I think I am going to have to pull the oven out now

are you getting mains power to oven?

It is a dual oven, so small one at the top with a Grill, then the main oven below.
The top oven/grill are fine. Just the main oven does not have a light on or anything now.

do you have a model number for aeg oven and i'll try and find an electric schematic for it and see what problem might be.

John Lewis JLDUOS705

I wonder if I have somehow blew a fuse internally. Got to be the only other possibility.

had a thought, could it be the timer on oven is on automatic.

Nope, top parts all fine.