I'll also be using this thread to document my experiences with AC repair workshops in Karachi.
Right now, I've got a Suzuki Jimny with an SS07LK10 OEM compressor that whines a lot when driving. I've had the compressor's bearing changed once, and the TXV changed once. I will need to hook up manifold gauges to confirm refrigerant pressures, but the AC functions fine except when idling in traffic. It starts to blow warm and the TXV starts to hiss.
I will probably need a new compressor eventually, but can't find one. For now, I just need a larger condenser fan.
I think it's the weak condenser fan, since opening the hood returns the cooling and lessens the TXV hiss.
@capsat used to recommend Sabir in Nazimabad, although his more recent reviews from forum members indicate that he's better avoided.
SanPak talked a big game about being the only official Sanden authorized this and that, and how their CEO in Lahore is Japanese, but ultimately didn't inspect my system or even hook up a manifold gauge set, only telling me to get a Duet compressor. They said they didn't have any new components in stock.
Mirza Umair Baig at Quick Cool charged me Rs. 5.5k to put foam pieces around my condenser and fan to form a makeshift shroud. One of his guys, connecting a manifold gauge set, vented some refrigerant out of the low side, and quite a lot from the high side. This was then claimed to be my fault, since I was the one who asked to measure pressures, and I had to pay Rs. 500 to replace the lost refrigerant, filled by "andaza" while flipping the canister over a few times.
Shaukat at M. S. Autos said my compressor is overheating, without hooking up any gauges or even checking temperatures and pressures. He said my radiator needed replacement (it does not) and my condenser fan was "strong."
Any more recommendations are welcome.