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We have a Neff double oven (U15E52N5GB/01) that has, for a long time, made a rattling noise in operation; and afterwards as long as the cooling fans are running. It’s always driven me mad and I finally got around to investigating today and removed the oven to take a look. The noise comes from the rear of the lower oven and sounds like a vibrating or buzzing panel rather than something more violent like fan blades hitting something. (I can post recordings of it if needed) It’s not the top mounted cooling fan, which I checked and it spins freely with no obvious rattle sources on the top part of the oven.
I then removed the lower cooling fan and that too spins freely (by hand) with no noise. Tapping the oven in various places (with the fan removed) causes some rattling noises, which seem to be coming from the inside somewhere, between the two ovens, i.e. not accessible without stripping down the actual chassis. Clearly the fan running is causing enough vibration to rattle something somewhere.
The oven works perfectly apart from this annoying noise, that only stops when the cooling fans switch off, which can be some 15-20 minutes after the oven is turned off. We now leave the oven doors open so it cools down quicker. Any ideas? The rear cooling fan obviously seems like the culprit, but it does work and seems smooth when turning by hand. Is it the most likely cause? Worth gambling £60-£100 on trying a replacement fan? Or is there a known rattle culprit elsewhere in these ovens?
you could try taking it out and looking at the bearings add a bit of light oil etc
other than that they are £69.22 from Neff
Dave
So altogether you have 3 fans in this thing. You have the top oven/grill cooling fan, the bottom main oven cooling fan, and the main oven blower motor fan which is the one smack in the middle of the round element. Ok so ignoring the top oven cooling fan you have the main oven fans left. So when you turn the main oven off after cooking something the main oven cooling fan continues to run for say, 20 mins until it switches itself off but whilst that fan is running you get this annoying noise = the cooling fan part 00742402. @ 69.22 quid. These fans when either the bearing fails or the long blades get choked with fat and/or sticky fluff get out of balance and can themselves, as that part create a noise BUT running in parallel you can have also a warped lower oven element in the top oven/ grill which can chatter against its housing so I just mention that element and it is the element that is under the top grill/oven enamell base so you cannot see the thing. Ordinarily if you replace the cooling fan 00742402 that should cure the problem whether it is clean or not it is a faily gutless motor but it is also fairly delicate with it too, you could try as need be clean the blades and oil the tiny carbon type bearing that is part of the shaft/spindel end that fixes into the rubber end plate – removing the fan and inspecting it does not usually prove, in my experience whether it alone is the culpit or something else entirely or both, such as the lower oven element in the top oven/grill is warped as mentioned (fairly common if that conventional oven is used, which with most people seemingly it isn`t but you may well might do). You are I suspect going to have to check the that top oven`s bottom element just to make sure it is ok or not. One other thing: when the main oven is turned on and the blower fan runs up to speed I take there is no weird noises from that so just whooshing air noise. only mentioned because that is the most common fan motor to fail out of the 3 and happens to be, typically, the most expensive so for future ref it is £184.12 part number 12048433 and I have had those make noise many a time and they are a pig to remove but if you say it is off when the noise occurs then that t`aint it then and it`s therefore best left well alone – you could make sure that the cover to that fan screws are fine though just incase they have rusted – the curse of cooker cleaner on non s/steel screws if that is applicable to you.
if it is the bottom top oven element part number is 00447451 £36.05 All parts and prices taken off Neff`s spares site.
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