I feel you here. Cleaning up an A/C takes up loads of time- at least 4 hours of solid work- and the returns for the mechanic aren't that great. Like how much is the guy gonna make? Maybe 600 bucks for labour and another 1000 for that gas canister? Because of this many guys give a half hearted response. Did the guy tell you something like "The blower is clean but there is a problem with the pipe connecting the blower" or some BS?I had my car aircon cleaned and repaired by a certain "de la Cruz" whose shop is located in Evangelista Avenue, Makati. He was given total freedom on what needs to be done or replaced to make the aircon fixed. However, we had to bring back the car several times and we were given different reasons each time. Upto now the aircon is still not working.
I'll gladly help with your problem- but what car do you own? Anyway, please do the following checklist:
The A/C belt: If you have a car priced < 5,00,000 INR (5,50,000 pesos), the chances are your car has a belt A/C (versus electronic). The belts get worn out really fast because they're made from sub-standard rubber parts from Thailand and/or Malaysia. Check the belt. The inside part of the belt should be uniform without wear. If there is even slight wear, CHANGE IT. You do NOT need to buy a company specific belt- you can get an exact made in any rubber moulding facility for like 1/10th the price.
The A/C gas: I'll need the exact make of your car to help you here. Each car A/C system has a different set of refilling A/C gas. Many mechanics use generic cannisters and this will produce a burst of results on the immediate and then fail very quickly as time goes by. Make sure he's using company gas. This could be a bit expensive in your area because I don't think they manufacture this part in the Philippines. Typically, each cannister should have an 6-8 digit ID code kinda thing. GIve me the make of your car (ex: Opel, Maruti, HM, etc) and model (Ex: Opel Astra, Maruti Esteem, HM Contessa) etc so I can dig up the part # for you.
Leaks: The worst cuplrit of them all. You should go your mechanic and specifically ask him to fix the leak in the A/C piping. Usually, it's in the connection areas. For obvious reasons, the cannister itself won't leak but you should keep an eye on the A/C pipings.
These are just some of the problems. If you could post what is exactly going on, I can zero it down to what's wrong w/ your car A/C. Does it give air immediately after the service but lose the cooling quickly after? Or does it not cool at all? Only fan air? Please give me some specifics.
Alternately, you always have another choice. You can opt for a complete A/C change. Go for a "Super King" brand A/C. We use this for the HM Ambassidor and it's more or less rugged. You can ask around some dudes in Vira mall (Greenhills). I dunno if it can be fit in your car, but I've fit it in an HM Ambassidor, a Mitsubishi Lancer and a Maruti Suzuki Swift. I've run the sucker for over 20,000 kilometers and no problems w/ the cooling. The entire system (with compressor, blower) is MUCH cheaper and WAY....W....A...Y better than it's Japanese/ American counterparts.
Other than SUper King there's always Jetstraab but the availability will be zero in your area. Ask for Super King in Vira Mall and/or any Bombay shop in your area and someone's bound to hook you up...