[EVfan]

My heater/AC makes a whistling noise at high fan speeds, and even at lower speeds (3-4) when driving 60+mph unless I switch to recirculate. Dealer re-positioned the cabin filter which seemed to help for awhile, but it has recurred. New cabin filter did not help. Dealer checked 3 other iPaces and says they all do this. Has anyone else experienced this and/or found a solution? (I'm considering removing the cabin filter...)

 

[PS702]

Mine makes a hissing sound, but not the sound you're describing.
BTW when the dealers have no idea how to fix something, thier favorite line: "it's normal", "we looked at other ones and they all do this"

 

[Deutsch100]

I cringe when dealers say "This is normal" or "Could not duplicate". Both cop outs and lies. I have had tons of BMWs (some great, some good and some terrible)...and BMW is notorious for this. With our 4 Rolls-Royces too....they do this. It must be a BMW directive.
Honestly, I hate going to any Service Center, even if you have a good one (Thousand Oaks Jaguar is as excellent as one can be).