How To Diagnose An Air Conditioning Unit That's Not Working In A Car

     

Diagnosing AC problems in a car may be a very complicated affair. You need to know a few things in order to understand whether the air conditioning unit is working properly or not. 

Firstly if you find that the AC's switch is on maximum cool & fans are on high speed but still  the unit is blowing only fairly cool air, then it's high time you should find a professional mechanic or technician who can solve your problem. However, before consulting a technician to do the job for you, you can also do the followings yourself: 

If you've been able to find out the reason for the AC unit not working properly, good! But if you still haven't been able to pinpoint any reason, then leave it to the professionals. 

It is also important for you to check the compressor whenever you detect an AC problem in your car. With engine running, just turn the AC on maximum, set the fans high & ensure the clutch engages on compressor. If it's not, make use of voltmeter to find the voltage that gets into the compressor. When there's voltage, clutch can be bad. And if there isn't any voltage then the cycle switch can be bad, the fuse can be blown & system may not even have sufficient refrigerant pressure for tripping low pressure cutoff switch. 

Leaks are also a very common problem that's associated with an AC system. When pressure is quite low, there is high chance that there is a leak. But now how will you know whether there is a leakage in your system? What you can do in such a case is use a UV AC leak detector kit to find out if there is a leak. Just follow all instructions given on the package and you will be able for finding out the leak. You also need to: 

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