We have a built in [Ikea kitchen] Baumatic oven; about 8 yrs old. The oven has started to screech. I can only think it is the fan. It is in a flat that we tenant and the tenant says there are 2 holes for screws but no screws. I am assuming the screeching noise is from the fan that suggests it is 'clogged up', but tenant has cleaned it, but when on the oven still screeches.

pam collins, February 2011