Summer is quite heavy these days, and no one would like to struggle with a busted AC. This happens when you skip regular automotive air conditioning repair and maintenance. But there are some common Car AC issues that you can solve by yourself. You can thank us later!
So, let’s get started!
First of all, you need to understand how your car’s AC works. It operates on a principle similar to a refrigerator, using a refrigerant to absorb heat from the cabin air and release it outside the vehicle. A refrigerant is a special fluid with a low boiling point used to transfer heat.
AC is a complex structure made of a compressor, condenser, evaporator, expansion valve/orifice tube, and a network of hoses and lines. Repair of each component could be complex, and self-repair could be expensive.
How Your Car’s AC System Works
The compressor, as the name indicates, compresses or pressurises the refrigerant gas. This raises the temperature of the gas and turns it into a high-pressure, high-temperature vapor.
This vapor flows into the condenser, where it is cooled by the ambient air passing through it. As the refrigerant cools, it condenses into a high-pressure liquid. The refrigerant then passes through a receiver/drier or accumulator, which removes moisture and filters out any debris.
Following the path, it passes through a narrow passage – Expansion Valve (or Orifice Tube), which restricts the flow of the high-pressure liquid refrigerant, cools it down, and eventually turns it into low-temperature, low-pressure mist. Afterwards, it flows through the evaporator’s coils in order to liquify and get back to the compressor. This cycle goes on, running and moving out all the hot air outside and bringing in the chill.
With time, the system can get weaker and cause you trouble. Here’s a brief guide to help you with it.
Issue 1: The Car AC is Not Blowing Cold Air
This is arguably the most infuriating car AC problem. If your car A/C isn’t cooling enough, first inspect and replace your cabin air filter if necessary. Usually, you can find it behind the glove box or under the hood. However, the location could vary in different car models.
If the problem continues, you may have a refrigerant lack or leak. In both cases, your car needs an expert’s attention.
A blown fuse, malfunctioning relay, or wiring problems can also disrupt the car AC system’s operation. Refer to the owner’s manual to locate the fuse box and check for any issues.
Issue 2: The Car AC is Blowing Warm Air
Now, things could worsen, if you’re receiving hot air continuously. This could be a sign of low refrigerant i.e. Freon. It’s recommended to have a professional mechanic for automotive air conditioning repair. They have the proper equipment to identify the leak and ensure the system is filled with the correct level.
Issue 3: Unusual Noises From The Car AC
If you hear grinding, squealing, or rattling sounds when you turn on your car AC, it’s likely a sign of a failing compressor clutch, debris in the blower motor (check the filter), loose belt, or broken fan.)
In case of any issue with the compressor, get it checked by a qualified car AC repair technician, instantly. Continuing to run the car AC with a faulty compressor can cause further damage. Moreover,, replacing it will be quite expensive.
Issue 4: Unpleasant Smell
A musty or mildew-like smell is often caused by bacteria and mold growing on the evaporator. Leaving your car AC in re-circulate mode for extended periods can trap moisture and could be the reason for mold growth. If the odor is mild, try running the car AC on high with the windows down for a few minutes to air it out.
But if the odor is too strong, it needs immediate anti-bacterial treatment. Call a professional.
Issue 5: The Car AC Isn’t Working At All
This could be due to a blown fuse, a faulty electrical relay, or a problem with the car A/C control module. You can simply check your car’s fuse box and replace any blown fuses.
If your car has a push-button start, try starting the engine with the key instead. This can sometimes bypass electrical issues and get your car AC working again.
If you’re residing in St.Peters and neighboring regions, HI-TECH Automotive is your trusted car expert. We can solve complex automotive air conditioning repairs in no time. Contact us at (636) 928-6050.