Your car's air conditioning system provides a comfortable environment when you drive. It heats the inside of your vehicle during cold seasons and cools it during warm weather. However, it's easy to ignore your air conditioning until something goes wrong. To prevent unexpected breakdowns and possible long-term issues, you should be aware of the different warning signs to stay ahead of costly repairs.

Here are two vital signs it's time to seek auto air conditioning repairs.

Unusual Sounds

You need to get your car's AC system checked urgently if you notice weird noises coming from the unit. They sometimes indicate a much bigger problem than you might think.

Below are common sounds and what they mean:

• Loud squealing. If this sound persists, there could be a problem with the serpentine belt. If this belt is cracked or dried, it needs to be replaced right away.
• Buzzing noise. This noise often comes from the AC compressor. If the problem is not addressed, it can cause too much cooling and damage the unit. Prolonged compressor issues can lead to complicated and expensive repairs.
• Knocking sounds. This less-common sound could be attributed to a loose mounting bolt on the AC's compressor.

Some of these issues are complex and can only be repaired by an auto repair expert. But first, make sure your auto specialist has enough experience with vehicle AC systems.

Unpleasant Odors

Oftentimes, your vehicle's air conditioning unit conditions the air from outside and into the car. If, for instance, you park near a dumpsite, a foul smell will find its way into your car. But sometimes the smell goes away if you drive away.

However, if your car's AC smells like vinegar, mildew, or mold, it's a sign of a significant problem with the unit. For example, the mold or mildew can grow in areas where moisture collects, such as the AC's evaporator. 

If you notice a burning smell, your AC system could have an issue with the compressor or a misaligned pulley. Sometimes, it could be electrical shorts, excessive dust, or burning wires.

In short, unpleasant odors from your car's AC system isn't a good thing. Since each smell could mean something different, it's hard to diagnose the problem yourself. You need to contact an auto repair service to diagnose and fix the problem quickly.

Your vehicle's AC system may get damaged over time due to many factors, such as old age and frequent usage. If this unit fails to provide the right temperature in your car, you need to ask your auto services expert to diagnose and fix any underlying problems.