Car A-C Problems – Troubleshooting Auto Air Conditioning

By | 13 October 2017

Automotive A/C issues are one of the misdiagnosed points on the subject of car repairs. The primary downside that auto technicians should troubleshoot and discover, is “why the AC is NOT blowing chilly.” When the automobile’s air conditioner has this downside, it may be attributable to considered one of many issues. The most typical reason behind the air con blowing heat air is a refrigerant leak. Irrespective of if the AC system makes use of R12, R134A or some other refrigerant; the idea of operation is similar. All of them require a full cost of refrigerant to work correctly. Refrigerant can leak from any of the parts within the system. A automobile’s AC parts are situated in numerous areas within the automobile – not all collectively in an simply replaceable unit like a home AC “window unit.” It’s important that the failed half is situated and changed to insure a long-lasting restore.

Search for Apparent Indicators of Leaks

The very first thing that anybody can do, mechanic or not is search for an apparent signal of a refrigerant leak. Most techniques may have UV dye within the system which is neon yellowish inexperienced. It may be seen simpler with a black mild, however it will possibly nonetheless be seen to the bare eye additionally. If there is no such thing as a dye within the system, the leak might trickle out clear oil. Examine all the parts beginning on the service ports. Have a look at the service fittings for leaks and all the hoses. Comply with the strains every path paying significantly shut consideration to the metallic ferrules that join the rubber hoses to the metallic strains. Verify for any strains that will have made contact with different parts beneath the hood and should have vibrated and induced a gap to be rubbed by means of. The condenser is situated in entrance of the radiator, verify each sq. inch for indicators of affect harm that will have induced a leak. Even with no rock or one thing hitting the condenser, there might nonetheless be a leak – search for proof of any oil residue particularly on all 4 corners.

Detect a Laborious to Discover Leak – Troubleshooting

After a fast visible inspection for leaks of the parts which are beneath the hood, it might be essential to look just a little additional with the assistance of a refrigerant leak detector to troubleshoot the issue. If the system has little oil in it, there is probably not a lot residue to see from a leak. With a freon leak detector, the leak may be detected even when it’s a very gradual one. Go over all the parts as talked about earlier than, however this time with the digital leak detector. The evaporator is the element within the passenger compartment, which is NOT seen like the opposite parts from beneath the hood. Leaks from the evaporator can generally be detected by means of the vents. A standard place to detect an evaporator leak is from the evaporator drain. Refrigerant is heavier than air, so it should naturally exit the water drain for the evaporator. Watch out NOT to permit water to enter the tip of the leak detector or it might be broken.


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