Noisy Heater/AC Blower Motor

Jamie-S

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Recently I replaced the heater blower motor due it to packing up.

Now with the new one installed I can hear it catching on the plastic surround up inside the dash.

The old one didn't, so I examined both together to see if there's a difference which there isnt apart from tiny little metal clips attached to the fan blades. Weights for balancing I'm thinking? Set to each different dash from factory?

I wander if there is a away to remove the fan blades from the old unit?

Any input would be great, audi want £143 per hour inspection :(