Blowing cold air is the primary use of your car’s AC. However, things can go sometimes wrong, and the opposite happens. Instead of blowing cold air, the AC might blow hot air. What has happened here?
Getting stuck in your car during summer while the AC shoots hot air is not a pleasant experience. In some cases, the car’s temperature can even exceed 100 degrees Celsius. The AC is here for preventing overheating, but it can become the heat source sometimes.
Taking immediate action is necessary when you begin to realize that the AC doesn’t blow cold air. Let’s get to the details now!
Diagnosing air conditioning problems can sometimes get overly complicated. You may fix the issue yourself, as well. The cause of the malfunction is the factor to consider here. It can be a minor case or some serious problem with the whole AC system, requiring professional service.
A quick tip:
Some car owners drive cars with broken AC because of many reasons. Your car’s AC not blowing cold air can lead to health impairments, such as dehydration, overheating, and regular headaches. Take it seriously when your car’s AC is blowing hot air!
Diagnosing AC Problems:
Analyzing the severity of the issue is the first task. Is the air coming through the AC cool, but not cold enough? Checking the AC controller is the first step; make sure it’s set on the coolest setting.
Check the cooling fans of the radiator or condenser; do those fans rotate while the AC is on? Blockages can happen from foreign objects, such as tree leaves, dirt, and even bugs.
Make sure the cabin air filter is free from obstructions.
You can use a manifold gauge set to determine the pressure in the AC system. Refer to the repair manual for more information on low-side and high-side pressures.
Many cases related to the car’s AC not blowing cold air originates within the compressor.
Run the engine and turn the AC to Max Cool. Make sure the clutch is engaging in the car’s compressor. What if the clutch isn’t engaging? Using a voltmeter to determine the voltage that the compressor is getting is the remedy.
If there’s voltage, then something may be wrong with the car’s clutch. No voltage suggests that a cycling switch is not functioning. Or, a blown fuse is causing the issue. Not enough refrigerant pressure also can lead to the same issue.
LEAKS Within the AC System:
Leaks within the system are the most common causes of AC problems. If you notice a pressure drop, a leak in one or more components may be the cause. You can use an AC leak detection kit for this purpose.
- Inspect hose manifolds on the compressor.
- Check the points where the hoses are coiled into the fittings.
- Inspect for pinholes in the condenser.
- Check the o-rings sealing and front seal the pressure switches on the back of a few compressors.
- Check where the evaporator drains condensation with UV light included in the test kit. Do you see dye and oil?
- Review the Schrader Valves.
- Check around all fittings to confirm that they are all secure.
What you don’t know much about? Well, you can get one of your friends or neighbors to check it for you. If the fix is beyond the DIY limit, then take the car to a service center. A technician can detect the exact leak or other malfunctions within the car’s AC system.
Here comes the hardest part. Electrical issues are the causes of why your car’s AC is not blowing cold air. Can you inspect it yourself? Well, you can perform a visual inspection, but handing over the task to a technician is advisable.
You can fix minor faults, such as broken or frayed wires. In some cases, you may detect damages in the electrical wiring system. Taking your car to a service center is the only choice in such cases.
Faulty Cooling Fans:
Cooling fans are a prime part of the car’s AC system. Fans not properly functioning means the condenser may not receive well cooling. As a result, the AC system would only emit hot air.
The car’s AC blowing hot air is a problem that requires immediate correction. Perform a visual inspection to check whether the fan is damaged.
You may need professional assistance if the fan needs replacing.
Car AC not blowing cold air is an affordable problem in most cases. Is your car an old one? If Yes, then the whole system may be faulty. However, get a technician to inspect it for you.
A commonly-made mistake leads to compressor problems. During winter, you wouldn’t turn the AC on. When you turn it on after a long time, it results in shocking the system. This occurrence is typical when you turn the AC after 2-3 months when winter is over.
You can try a remedy to prevent it from happening. Once every three weeks, run the AV at the highest cooling setting for about 15 minutes. And this 15-minute action increases the durability of the compressor and minimizes complications to a greater extent.
A car’s AC not blowing cold wind can give you a hard time, especially during summer. However, the cause of it might be a simple fault, such as a leaking tube. Spotting the leak may give you a headache if you are not much familiar with the AC system. As explained previously, a leak in the car’s AC system is the most common cause of system malfunctions.
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If your car is brand new, then the AC system of it would function without giving you trouble for many months. Old cars are more prone to this issue as the whole AC system has already worked harder for many years.