I think my oven may have been overheating?

[T4tomo]

I am just replacing my built in oven (as the door has become ill fitting). Slightly horrified to discover this when I took the old one out.

There is a similar shaped protrusion on the base of the oven. Surely it shouldn't have been getting so hot to burn the cabinet?

These things are supposed to just sit on a standard shelf aren't they??

 

[T4tomo]

Any advice on what to do before refitting the new one would be appreciated.

 

[Adam4868]

I'm guessing your oven has failed in some way there as you shouldn't have that happen !
You could buy a sheet of fire board/cement board and sit it on that...just to put your mind at rest with the new oven.Easy enough to do yourself.

 

[OldShep]

Wow you’ve had a lucky escape. Never seen that before I assume it was a cheap 'packaged with kitchen' type fitted?

 

[fossyant]

I wonder if the insulation has failed or a poorly fitting door could have caused issues with the casing ventilation.

 

[T4tomo]

Yes could easy have caused a fire😲

It was at cheaper end, a baumatic, but bought from AO.com or similar.

Yes @fossyant I think maybe the heat leaking from door seal may have made it over heat to compensate, although it's a poor design that the bottom wasn't flat so rather then rest on mini legs with an air gap, part of the metal base was sat on the shelf.

 

[newts]

Have you got a picture of the bottom of the oven? Had the oven been 'modified' to make it fit into the unit?

 

[raleighnut]

Is an oven like that meant to sit on a shelf, I'd have thought 2 support battens would be better to allow cooling air around the casing

 

[T4tomo]

Have you got a picture of the bottom of the oven? Had the oven been 'modified' to make it fit into the unit?

No modification whatsoever

 

[T4tomo]

Is an oven like that meant to sit on a shelf, I'd have thought 2 support battens would be better to allow cooling air around the casing

I'm pretty sure they are, as that's how built in oven carcasses are supplied.
You leave gaps at side and a big void at the rear, but they are designed to sit on a shelf

 

[fossyant]

They rely on the case cooling, so if a poor door seal is causing extra heating and poor air flow, this could be it. We replaced an old one due to poor door seal that was causing the carcase around it to get warmer than expected.

 

[newts]

No modification whatsoever

That's alot of heat transfer through the oven casing😯. I wonder what's failed inside the oven to get a such a hot spot.

 

[T4tomo]

Whilst the new oven shouldn't have the same fault i hope, I'm thinking I might put a couple of strips of 3-6mm mdf down each side of the shelf (so I can still slide the oven in and out easily and adds to the "gap" under the oven base) and put a silicon baking mat in the "well" in between, as they are heat resistant to 250*C plus.

thoughts

 

[newts]

Whilst the new oven shouldn't have the same fault i hope, I'm thinking I might put a couple of strips of 3-6mm mdf down each side of the shelf (so I can still slide the oven in and out easily and adds to the "gap" under the oven base) and put a silicon baking mat in the "well" in between, as they are heat resistant to 250*C plus.

thoughts

Good idea.
Can you drop the shelf that the oven sits on by ~10mm & use larger packing strip to get a bigget air gap?
Also ensure that the plinth has adequate gap to allow through ventillation up the back of the housing unit.

 

[T4tomo]

Good idea.
Can you drop the shelf that the oven sits on by ~10mm & use larger packing strip to get a bigget air gap?
Also ensure that the plinth has adequate gap to allow through ventillation up the back of the housing unit.

Not easily re dropping the shelf - its structural to the carcass which is quite old* and no idea of what make to get correct fittings. Its very solidly held and I don't want to fark about with it. It looks like 4 fittings under the shelf screw into fittings pre-embeded in the carcass sides, It I take those out for a better look and they don't go back in very well, I'll then have a heavy double oven sat on a weakened shelf**.

Ventilation up the back is fine and I think I have enough space to do my plan to lift the sides of the base a little I don't think it was a ventilation air gap issue to start with, pretty sure it was an "oven base overheating where it shouldn't" fault. Given I'm replacing the oven, all should be fine.

*When I did up my kitchen a few years back I just replaced all the doors and worktops / splash backs and left the carcasses in situ.

**I've done the moving shelves around bit in another house when we couldn't get a like for like sized replacement for a built in microwave / grill combined top oven. That was the only way, but a lot of work, new oven was smaller so ended up creating a slim baking tray cupboard under it with a draw front acting as cupboard door i had to drill it out to fit the soft close hinges and fit some pretty heavy duty brackets to rest the new shelf on and everything!! It looked very smart but was a fiddly job.