If it's really like a cricket, ie "crick-crick-crick-crick" then I'd guess the fan, yes.
If it's a steady criiiiiiiiiiiiick, then maybe the door over the dust filter isn't installed correctly.
Gilly
ps would be worth taking out the blower to add a few drops of 3 in 1 oil, on older 210's you may be forced to buy a LOT more than you need to replace the blower

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