In this post i gonna talk on how to troubleshoot an a/c problem in car. Many of us will not regularly service our car a/c like what we did on our engine. This is because car manufacturer rarely push to buyer and car owner about the importances to keep a good a/c system as to prevent unwanted break down of a/c. Of cause if compare an a/c to an engine, sure the engine is most important. But as a car owner, who does not want the car to be in good condition the whole time? So we must improve our self to know how to keep a good running car, so that the car does not fail us on the most importance day in our life.
So, the basic of a/c i was talking on my blog, i have gone through all the parts which is used in our car a/c. So if some parts or a part is failing, it will cause problem, then the a/c will not produce nice cold air as it should. Went into a/c shop, we will depend on the technician to tell us what is causing the problem.
Most of car owner is not aware that the detail the technician give is correct or not. They just simply say: ok, just do what you should do.. Then the nightmare begin...A proper done job on car a/c will save a lot of money and time in the long term. But a poorly done job.....It will not only cost you a lot of time, it will also burn a hole through your wallet. Trust me when i say a hole in the wallet.
Then, how should one troubleshoot an a/c problem? Ask your self this question first before making any move:
For new car less than 4 years:
1. Have you done your a/c service?
2. Have you change air con cabin air filter?
For old car more than 4 years:
1. When is the last time you service the a/c?
2. How long have it been after the last a/c service?
3. Have you change air con cabin air filter?
4. Have you change filter drier on last service?
This question need to be ask first, because many a/c problem is cause by a dirty cabin air filter, dirty evaporator, dirty filter drier and dirty condenser. When the cabin air filter and evaporator is dirty, the refrigerant inside evaporator will not have enough contact with the hot air outside evaporator, then the hot air cannot efficiently transfer the heat to the refrigerant (see my post on How does it work).
A dirty filter drier will cause the refrigerant flow be restricted. This will cause a weak flow of liquid state refrigerant into the evaporator. When this happen, there will be not enough refrigerant flow to take away the heat of the hot air around evaporator. Dirty condenser will cause poor effectiveness of the refrigerant to transfer heat to surrounding air before flow into evaporator. A high energy(heat) refrigerant will only be able to carry little energy from the hot air inside cabin thus the air will not be cooled enough.
This kind of problem can be easily solve by having a full a/c cleaning done on evaporator and condenser with new cabin air filter and also new filter drier changed. With a proper cleaning on evaporator and condenser as well as a proper level of refrigerant recharge back into system, the problem of not producing cold air should be okay in at least 2-3 years.
This is part 1 of this post. I will talk bout other problem in second post. Stay tune for more.
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