Well my chimney was fitted around 7 years ago. Until this March 2019 I identified some problem in my chimney. I called up service centre to check the problem and they do came to check but afterwards they didn’t bother fix the problem. Some says it’s rotor problem other says to change the motor! Even though the technician lodged a replacement still the service centre of South Kolkata, West Bengal didn’t bother to send someone and change. Very poor service centre and highly disappointed!