[kwatt]

I am not familiar with the model and no access to technical for them (:mad:) but it does sound like it could be any one of a number of things.

The wiring is a favourite on these I know but that could equally be a sensor or board issue.

Probably not a lot of help but it’s about as much as I can offer.

K.

[kwatt]

Nope, that one is the only show in town for that oven.

K.

[kwatt]

Dug a bit and there are actually two fan initiation stats in it, looks to be one for each cavity and both are this one:

https://shop.ukwhitegoods.co.uk/818731204-cooling-fan-thermostat

So it’s possible the one for the upper oven is shot.

K.

[kwatt]

I prefer testing to guessing, just saying no offence intended. 😉

Open it up, check stuff, it’s the only way.

K.

[kwatt]

Possibly but it’s the only thing I can think that changes.

Logically the fan is the same for both ovens. The fan initiation stat is the same. The overheat is the same. So if it was not working on one oven, it wouldn’t be working on either or, vice versa.

All that changes in use are the switch and oven thermostat, the oven thermostat for each oven having bog all to do with the cooling system in any way. Which only really leaves you the switch before you get into exotic weird stuff that is unlikely.

There is only one tangential cooling fan motor in that oven, blowout attached of it.

Blowing hot air into it doesn’t really prove a lot other than, the fan works as does the initiation stat.

K.

[kwatt]

Because something has to tell the cooling fan to energise and the only thing you move to do that on each oven is the switch.

K.

[kwatt]

Suspect because the bottom oven is working and it’s the same fan and stat in play so the switch is the only thing in that not common to both really or, anything else is pretty exotic.

It’ll be a DO4SS-5, no DO44SS exists.

The switch is:

https://shop.ukwhitegoods.co.uk/811730234-smeg-oven-selector-switch

K.

[kwatt]

That top oven selector switch would be the first thing I’d look at.

K.

[kwatt]

The salt cap used in that dishwasher is this one for sure:

https://shop.ukwhitegoods.co.uk/1503268003-dishwasher-salt-cap

K.

[kwatt]

Bet your board last longer than the rest of it. 😉

I take it you did all that just to see if it could be done?

K.

[kwatt]

Because there’s more than likely a broken wire in the loom. 😉

K.

[kwatt]

It’s not the PCB.

K.

[kwatt]

The wiring harness in the door could be the problem.

K.

[kwatt]

No, that’s the product code that is on the rating plate around the lip of the door.

K.

[kwatt]

It’s a Cata brand for B&Q and not easy to get parts for normally.

K.

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