hi bro cheelam,

i need some advise from u regarding my air cond situation, my car air cond (satria 1.6, 1996) actually very cold till march this year(i bought it 2nd hand on 2009) where the air flow from the a/c vent start to block after some driving around 30 minutes, i need to off the a/c for a while then turn on then it will be ok and the a/c is still very cold, then the problem will repeat again and again as long as im driving.

i go to an a/c mechanic around my area(shah alam) on april and they told me that problem came from my thermostat sensor(rm140) which i need to replace. they said i need to service(rm110+ gas rm40) the a/c becoz the sensor is attached to the cooling coil. so i just agree with the suggestion. during the servicing process they asked me to replace the valve(rm140) near the coil and the filter(seems like a tube or can)(rm70) too. so i have paid rm500 for the job.

then the blocking problem have gone but i can feel the a/c is not very cold anymore. when i ask the mechanic they say its normal and asked me to wait around 2-3 days for the a/c to be normal back. I've waited for a week and the a/c still the same and i notice it not cold at all when its hot outside on afternoon and not so cold when its not hot outside during daytime and only cold during the night.

when i go back to the mechanic, they said may be need to top up the gas abit more(from 23psi earlier to 30 psi) and i end up paying another rm40. they asked me to test it around another week. no different after a week waiting then i go back to the mechanic again to complain. then they suggest me to re service back as they suspect something may be wrong and i may end up paying more if they encounter other problem within my a/c system. i started to get fed up with their behavior and i refuse to follow their advise at that moment.

so my question now, am i being conned here? what are the advise and solution for my problem? what is the estimation on the cost to fix the problem as im still a university student where my cash flow is not as smooth as working people.

thanks.