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It turned out that the noise was because of a buildup of "crud" between the impeller fan housing and the motor body with some ingress onto the motor shaft. Cleaned out, using a thin rope and sawing that back and forth. Also, I was able to insert the back of a hacksaw blade into the gap between...

Hi - happy 2019 & I know this boiler (Iona 90) is old - but so am I! Problem Ecoflam Minor 4 electric motor -Simil - bearing on fan side - noisy. From posts by @oilman - "The bearings are 6206-2RS and 6206-2Z" No disrespect intended, posts were from 10 years ago, but is this still accurate...