it's my first car, but it's 1999 secondhand wira 

some food for thought:
an entire aircond system with ALL original denso parts for a 1999 iswara cost 2-2.4k ish.
not including labor/aircond gas etc

a Mitsubishi compressor ONLY for a lancer/inspira cost rm4k+ (SC price) part alone

depending on what needs to be replaced, you can get an idea on why air cond are expensive and why they should be serviced appropriately as it can save you hefty repair bills in the long run as opposed to replacing the entire part.

so if you think an aircond workshop is cheating you, think again.
when in doubt, go for second opinions before proceeding and most importantly go to legitimate workshops authorized dealers (eg: denso authorized dealer) or even SC

while you definitely need to pay more especially on the labor side, chance of them cheating you is a lot less and complaints/claims against them should shit happen/they actually cheated you is a lot more effective than against no name workshops (they don't have much to lose)

Going to service centers aren't exactly risk-free though.

reminded me of my aircond trip last time (lol compressor/magnetic clutch exploded and had melted plastic bits all over my engine bay)

http://twitpic.com/photos/Quazacolt?page=24
the money shots:
http://twitpic.com/bl49d9
http://twitpic.com/bl49ii

If case is not cold(not like yours no gas), it could be condenser or cooling coil or the whole system clogged with gunk from wear and tear. If that's the case, usually cooling coil  and condenser will first try to clean with special chemical, if after 2~3 rounds still dirty as hell, change straight away. And if really really teruk, compressor also might need to change. On some recond compressor with warranty, the t&c for warranty is 'warranty void if compressor fluid black'

thanks guys. maybe i didn't pay that much after all..

btw he didn't fit me with a Denso cooling coil, he installed a Paco one (rm370, and expansion valve rm85). When he showed me my old cooling coil he showed a lot of dirt and some stains which he said was a sure sign of leaking.

anyway it's been a full day, aircond still very cold. hopefully this time it lasts. 

it's my first car, but it's 1999 secondhand wira 

If case is not cold(not like yours no gas), it could be condenser or cooling coil or the whole system clogged with gunk from wear and tear. If that's the case, usually cooling coil  and condenser will first try to clean with special chemical, if after 2~3 rounds still dirty as hell, change straight away. And if really really teruk, compressor also might need to change. On some recond compressor with warranty, the t&c for warranty is 'warranty void if compressor fluid black'

UPDATE: Aircond f***ed again all of a sudden. It's been one week. Yesterday still cold, today suddenly not cold at all, blowing hot air.

Now what?

UPDATE: Aircond f***ed again all of a sudden. It's been one week. Yesterday still cold, today suddenly not cold at all, blowing hot air.

Now what?

bro now again my aricond is gone, all of a sudden not cold. gas leak again?

btw the first mechanic i went to was saying something about me driving too fast and pressure building up so the the gas was intentionally leaked by the compressor to relieve the pressure.. (idk if i understood him correctly). he was trying to explain to me why my aircond was not cold all of a sudden instead of gradually. I am already out of money lol now how 

And to make matters worse, I lost the receipt (it was in bag which was stolen recently). 

Please just go to the Proton service center, if they repair once and it fails they will not charge you double. This already happened 3 times to you and you are just wasting more money than a service center would have charged. These guys are scammers , never trust random service men especially for aircond.

some food for thought:
an entire aircond system with ALL original denso parts for a 1999 iswara cost 2-2.4k ish.
not including labor/aircond gas etc

a Mitsubishi compressor ONLY for a lancer/inspira cost rm4k+ (SC price) part alone

depending on what needs to be replaced, you can get an idea on why air cond are expensive and why they should be serviced appropriately as it can save you hefty repair bills in the long run as opposed to replacing the entire part.

so if you think an aircond workshop is cheating you, think again.
when in doubt, go for second opinions before proceeding and most importantly go to legitimate workshops authorized dealers (eg: denso authorized dealer) or even SC

while you definitely need to pay more especially on the labor side, chance of them cheating you is a lot less and complaints/claims against them should shit happen/they actually cheated you is a lot more effective than against no name workshops (they don't have much to lose)

Now what?

Wahhh..our lala aircond so expensive!! Can get other cheaper brands? How do you naintain aircond anyway, other than refilling gas? You only refill gas ifbit leaks right, otherwise, the aircond will stay cool.

compressor runs on oil as well:

similar to car's engine oil.

overtime you'll need to drain/replace, or even top up if there's reduction/loss in oil (eg: lots of usage especially under hot afternoon sun and you always have the air cond at maximum coldness temperatures to induce more compressor load)

typical compressor checking/refill/replace is 40-80k km or 1-2 years whichever comes first, or depending on budget. people tend to neglect this element, and only make noise when it's not working, and usually a LOT of noise because parts are VERY expensive.

not to mention, if the workshops/aircond shops are inexperience (eg: fail to troubleshoot on the first time properly), don't expect the layman to know any better as evident in this very thread.

Fark.....the Proton SC never recommend me to change this....3 yrs+ liao....my mileage just exceed 4xk now.