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I have a problem with the top fan not working. After about 30mins the oven switches off completely i.e. no display but the ignition still works. Recently I noticed a lot of interference to the freeview signal when the oven was switched on but that has now stopped happening. I don’t think it’s the fan because using a testing screwdriver I found there is no power is getting to the fan. There is a grey relay block with 2 blue wires and 2 white wires that gets very hot to the touch. I suspect that it’s the coil on the relay but I can’t see it on any spares list online. Is there a substitute?
Re: Smeg SUK60MFX
Doesn’t make sense. There is only one fan motor, in the back of the oven cavity. It takes a common neutral off the elements and is directly switched on and off by the selector switch in the control panel. If this doesn’t run, the fan oven element will start to over heat and a safety thermostat will shut it all down.
Using a neon screwdriver will not give you the information you need and live testing is extremely dangerous anyway. You need to isolate the machine and start doing some circuit testing and resistance testing with a proper test meter.
Penguin45.
Re: Smeg SUK60MFX
I can assure there is a fan on top. The relay (shown in the image bottom centre) has two blue wires and two white. The blue wires I assume feed the coil and one of the white wires carry 240v to one side of a normally open relay with the other white wire feeding the fan via another component. Using a meter there is no voltage appearing at the fan terminals. This leads me to assume that it is the relay where the fault lies. But I could be wrong! As I mentioned the relay does get very hot. A circuit diagram would be handy though.
Re: Smeg SUK60MFX
I was correct in narrowing it down to the relay component. On removing the cover I found It to be a thermal relay which operates the top fan when the relay gets to a set temperature (that’s why it is hot to touch)and switches off when cooled. This explains the delay in the fan stopping about 10mins after the oven is switched off. The contacts are permanently open. I did test the fan by bypassing the unit and it worked OK. I have contacted Servevast to try and get one.
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