My ac quit working on all speeds except 4 after having the hepa filter replaced. Took it back to the dealership they said it was the blower motor transistor. Just picked it up and now I hear a fluttering noise on all settings except off. Called the dealership and they say it is probably leaves in the blower motor. They said the two are not related. Is this true? I have never had problems until I took it to the dealership for a 60k service and now it is one problem after another. Please help!! Should I continue to argue with them?

Part of the filter or some other debris has gotten into the blower case and the fan is hitting it.
The transistor fixed one problem but they may have missed the other problem.
Argue if you'd like. You may get a few buck off, but your next visit won't likely be a warm reception.

I'd like to be there when they take the blower out to remove the culprit... leaves or otherwise.