If you are lucky then the chimney runs for 5 - 7 years. Problems will start after 7 years.
Kutchina sells its chimneys having self-cleaning technology - but they recommend AMC.
AMC does not cover spare parts in case any electrical component becomes dysfunctional.
Replacing the circuit board costs more than Rs 4000 and they will charge Rs 300 for a capacitor change, Rs 800 - 1000 for replacing fan motors and they will replace your motor with old repaired motors.
There is no guarantee on the repaired parts.
The behaviour of AMC helpdesk is poor.
Considering the hassles in the event of a breakdown after warranty period, I do not recommend any Kutchina product.