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Common A/C System Problems

10/Apr/2022 141 |

The first indication of a problem with the air conditioner is that it stops blowing cold air. The A/C system is meant to be completely sealed, and when problems arise, it is usually due to gas escaping from the system or contaminants getting into it.


The compressed gases in the A/C system require seals and valves, and over time these will degrade. Pinholes in metal lines can be a problem, too. Keep in mind that a slow leak will eventually turn into a big one. You can add more refrigerant to the A/C system, but the problem will eventually get worse.


Major leaks lead to catastrophic problems, like compressor failures. This can happen when the magnetic clutch on the compressor fails, which prevents the compressor from spinning, or the clutch fails to release and the compressor runs all the time.


Most issues with the A/C system can be diagnosed with the use of a set of gauges. The gauges read the pressure on both the high- and low-pressure sides of the system. Most of the time, checking the low-pressure side is enough to tell you if you need professional assistance.


Since the air conditioning exchanges cold and hot air, condensation forms on the condenser located under the dash. This drips off and runs out of a drain located at the bottom of the box that holds the condenser. If the drain becomes clogged, it creates a cool, moist area for mold and other unpleasant-smelling things to grow.


Newer cars may have a cabin filter to clean the air as it passes through the heater and A/C system. It is usually located under the dash on the passenger side or under a panel in the engine compartment. The filter may become clogged, causing odor or limited performance of the A/C and heater system.

Global Spare Parts, Oman

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