Salam to all of u, I m not a A/c consultant nor a Technician but I have driven 10 to 12 owned cars & i have experienced several problems that u have might not known!!!
If u have a small car like 800cc, 950cc, 1000cc or 1100cc. So follow these instructions & InshAllah u will get good results. Because I myself own a 2001 Suzuki Mehran & the A/c works perfect & great MashAllah..
I have installed a Sanden SD-705 compressor (KABLI) around 7.5K & other parts like Condensor, Evaporator, Dryer, all r of optimum & of good quality as available in market.
Actually SD-705 compressor comes in company fitted Alto & Cultus but me & my Technician discussed & came to solution to alter it! & we succeeded. He made my Car Fan direct. Serviced my Radiator by Hard Acid. Cleaned all A/c parts & now in hot sunshine like in Hyderabad, Karachi & Sehwan Sharif, it gives a good pleasure to sit in the car & in night times I usually turn off the A/c because there oo mush cooling like Cultus!!!
If u have many further problems, Contact me @ 0331-351-4563, My name is Abbas Ali Abbasi usually live in Hyderabad & Karachi..