Does GT 9FA needs summer and winter different tunning? Please help in this regard,
Your question is a little vague. Can we get a bit more information? Are we talking DLN tuning or general performance? Please give more information, winter vs Summer is interesting. Please give location and climate.
You haven' provided all of the requested information.
Where is the unit located?
What are the expected minimum and maximum temperatures during the year?
>Not really, what kind of climate (temps) do have?
it's moderate temp in Bangladesh,