SOURCE: Delonghi ESM465ST Oven Noisy Fan
If it is a fan assisted oven, then you are likely to have 2 fans, an external cooling fan, and a fan inside the oven for ciculating the hot air.
So to answer your query, yes it is a noisy fan you are going to have to establish which fan.
It could be a worn bearing, or the fan blade has come loose.
If it is a worn bearing, thge only cure is a new fan.
Hope this helps with your problem.
Testimonial: "Thank you for that. It's noisy even when the fan inside the oven isn't running (ie, just on convection) so guess that means it's the external fan?"
SOURCE: Delonghi ESM465ST Oven Noisy Fan
I had this on my cooker a few months ago. I took the hob off, (quite time consuming, but not difficult) and found the long fan. Atfer needlessly removing the fan, I found one of the spindals/axles had come out and the fan was unsupported. I just puched it back in and it's been fine since.
Hope this helps.
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