Wa Alaikum Salam.
YES Dear Brother, I am fine and doing Great by the Grace of ALLAH ALMIGHTY. How are you?
Sorry for replying that late, had been busy and occupied.
No idea dear, as despite belonging to Lahore (its my hometown), I now reside in the Federal Capital. I regret, I may not be able to help you in this regard.
Well, it depends...
If CVTF Filter is extremely dirty and needs replacement, then one is left with no other option, other than to have the pan opened, and filter replaced with a clean, brand new one.