Smeg SUK91MFX5 Fan oven won’t heat up. PCB?

[smegman]

I have a three year old SUK91MFX5 cooker. 90 cm wide, 5 gas hobs, electric oven

When using the fan oven function it no longer heats up. All other functions are fully working.

When turned to fan oven and set to a temperature the fans turn, and there is a current present at the wires supplying the elements. Both elements are fully functional, as confirmed by a continuity test, which gave a reading of approx 26 ohms.

Having done some research on the internet (and this forum in particular) this would appear to be a problem with the PCB, with many other people having expressed a similar problem.

Has anybody has success with replacing the PCB as a solution to this problem? I’m hesitant to buy one if that’s not the fix, as the cost approx £98.

Anybody with experience of whether this is the solution, please?

[kwatt]

Re: Smeg SUK91MFX5 Fan oven won’t heat up. PCB?

Please don’t copy and paste to multiple threads, it is very irritating and duplicates get deleted anyway.

The board isn’t £98, it’s a lot less, shown here:

http://shop.ukwhitegoods.co.uk/81165019 … board-9164

K.

[smegman]

Re: Smeg SUK91MFX5 Fan oven won’t heat up. PCB?

KWATT,

Thank you very much, and I apologise for posting multiple messages. I’m new to this, and as the other threads were all old I was hoping to gain the benefit of their experience.

Also, thank you for posting the link to that spare part on this site. It is over £90 other places, much more reasonable through this site.

Could I ask, do you think that is the most likely cause, and have you had any experience of this problem? i seems to be fairly common on here and other places on the internet. The PCB seems the most likely cause, but I can’t find anyone definitively stating that replacing it has worked for them.

Regards

[kwatt]

Re: Smeg SUK91MFX5 Fan oven won’t heat up. PCB?

By the sounds of it, it’s either the PCB or an overheat thermostat if the elements are okay as there’s little else that could give those symptoms.

K.

[SAMURI]

Re: Smeg SUK91MFX5 Fan oven won’t heat up. PCB?

If the fan is working I would still think it would be an element fault.

If you have power to the wires to the element then it can only be an element fault.

Bob

[lee8]

Re: Smeg SUK91MFX5 Fan oven won’t heat up. PCB?

Not if both sides have 240. It’s impossible to tell you the component that is at fault without being there and carrying out basic checks, you’ll need to check them.

[smegman]

Re: Smeg SUK91MFX5 Fan oven won’t heat up. PCB?

Cheers for the interest lads. Kwatt, thank you very much.
I’m afraid that it’s definitely not the elements. they’ve been continuity tested and passed, I also tried a new one just in case. There’s definitely something in between the nobs and the elements that’s not right.
Seems like a PCB change will be my first COA, having heard it bandied about in quite a few places. If that fails it will be the overheat thermostat. There aren’t really that many things in this chain!

[Allsorts]

Re: Smeg SUK91MFX5 Fan oven won’t heat up. PCB?

When you say there is current present at the wires supplying the element, how are you measuring this?

[Farmerguy]

Re: Smeg SUK91MFX5 Fan oven won’t heat up. PCB?

I had similar problems and just posted about Gorenje Timer, most machines have similar relays and mine would pass volts but not the current, so shorted it out.
Regards

[smegman]

Re: Smeg SUK91MFX5 Fan oven won’t heat up. PCB?

Allsorts,
I’m measuring it with a KewTech Voltmeter, which is reading 230 volts across the two wires with the element removed. It does this for both the elements. I’m well aware that current is not measured in volts, but there is definitely a supply to the wires which lead to the element.

Farmerguy How can it pass volts but not current? is that even possible? i think it’s a problem with the switching and controlling of the power to the elements, I can only think that the PCB does some sort of wizardry that would make the oven heat up.

[Author]

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