Smeg DO10PSS Cut-out problem

[mark_r]

Hello again. It has been a while and last time I was here asking about an issue with this oven it all ended well.

The issue this time is that the main oven compartment started cutting out at very high temperatures (240C) a couple of months ago. When I say cutting out what happens is that the oven shuts down turning off all elements, circulation fan and display leaving only the cooling fan running. once the oven cools a little the oven pops back on and once the timer is rest all is well. We managed the situation by simply not turning the oven up so high – so not a real problem. However the oven has started cutting out at around 200C now – exact same behavio – this is now a much more impactful problem.

I have tried to debug the issue a little

1. The coiling fan still seams to be running OK – I can feel the air coming from above the door of the main compartment and it does not appear “weaker” than it used to.
2. I have heated the over up to various temperatures below 200C and the main thermostat seams to be working correctly (temperature light goes off when desired temperature reached etc).
3. All the over elements appear to be heating and the circulation fan seams to run OK

I have done some digging around in the various fora and it would seam that the “Thermal cut out” for the main oven may be faulty, but also that the cooling fan may be not cooling enough. Would greatly appreciate any advice as we like the oven and would prefer not to replace it if at all viable.

Once again thanks in advance

Mark

[electrofix]

i would change the thermal cutout, also check the leads connected to it for signs of heating. if the leads get warm because of bad connection it add to the heat so stat trips out early

Dave

[mark_r]

Thanks Dave much appreciated. Been looking on the parts section and the part with SKU 818731478 would seam to be the one I need – it doesn’t specify top or bottom ovens are they both the same?

Appreciate the help.

mark

[electrofix]

dont know

seems to be 170 degrees
https://shop.ukwhitegoods.co.uk/818731478-oven-safety-cut-out-thermostat

so if you find it, it may be marked

Dave

[mark_r]

Thanks Dave – went ahead and ordered one hopefully will save me the hassle of taking it out and apart more than once……fingers crossed

mark

[mark_r]

OK so I ordered the 170C cut off stat, turned up today so I took oven out and opened the back and it turns out the cut off stat in there is 140C ☹️

would appear to be this one https://shop.ukwhitegoods.co.uk/818731476-smeg-140c-safety-thermostathttps://shop.ukwhitegoods.co.uk/818731476-smeg-140c-safety-thermostat

This also states it is compatible with this oven.

Stupid question and I expect I know the answer but would it be safe to replace with the 170C one? I am assuming not…..

Mark

[electrofix]

if the manufacturers decided the 140 is the correct part then increasing it to 170 cant be safe

Dave

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