Thanks for the ideas. For some reason it totally slipped my mind to search for old threads first 
Ended up giving it a good cleaning and unplugging it / defrosting it for 12 hours. Seems to have worked!
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ech·o cham·ber
/ˈekō ˌCHāmbər/
noun
An environment in which a person encounters only beliefs or opinions that coincide with their own, so that their existing views are reinforced and alternative ideas are not considered.
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