I have removed the filter and its was working fine but after running for 5 to 10 km its doing same this. Airflow reduced and noise is same. Could it be the issue with connectors/bush of motor. Some of my friend was telling that its relay issue. I don't have any idea about the what is relay...........
I check with mechanic with 2 person everyone is telling different story and seems like they just want to make money and they don't know the exact issue.
Mechanic 1: Servicing is required for cooling box and whole system. Once they will open if any part is damaged/depreciated need to be replace.
Mechanic 2: Blower with motor need to be replace + AC Servicing.
These mechanic make you more confused as they themselves don't know whats the issue.