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Drivaire Ventalation not working

Hi, we have an old Drivaire ventilation system in our house - we've noticed it appears to have stopped blowing over the last 6 months or so. It may be something with the electrics, the motor etc. We had new lighting installed around it, so that may have had an impact. Photos attached of the unit and controls. We'd like someone to diagnose the problem and find a suitable fix if its cost effective. Cheers