Your car AC may not be blowing cold air for a variety of reasons. Recharging your car’s AC refrigerant or fixing a refrigerant leak could resolve the issue, but complex electrical climate control repairs or a slipping compressor clutch may be necessary to get your air conditioning back to full efficiency.
Because of where the hoses and lines are located, the air conditioning system in your car may be complex.
The refrigerant is basically compressed and heated by your car’s air conditioning system before being allowed to decompress and condense into a liquid, which causes it to lose heat quickly.
To get the temperature you want, you must repeatedly repeat this process, which absorbs heat from the car’s interior.
Today, we’ll be looking at the most common and possible reasons why your car AC is not blowing cold air.
9 reasons why your car AC is not blowing cold air
Reasons why your car AC is not blowing cold air include:
- The AC system is empty and needs to be recharged.
- Refrigerant leak in the AC system.
- Failing Cabin Filter.
- A malfunctioning air conditioning control unit.
- Damaged AC condenser.
- A Faulty AC Pressure Switch.
- Faulty AC compressor clutch.
- A malfunctioning AC compressor.
- Damaged condenser fan.
The AC system is empty and needs to be recharged
The requirement for a recharge is the most common reason why a car AC doesn’t get cold enough. You can recharge your refrigerant yourself, but it will save you time and ensure that the job is done properly if you schedule an appointment with your local, reliable auto shop.
Refrigerant leak in the AC system
A refrigerant leak is another possible reason why your car AC is not blowing cold air. A refrigerant is added to your air conditioner to ensure that the entire system is functioning properly. When the car is running, the pressure of this refrigerant system, which is high, can exceed 15 bars.
Both this pressure and a specified quantity of refrigerant are necessary for the AC system to function effectively. If there is a leak in the AC system, the pressure will gradually decrease until it eventually stops functioning altogether.
Failing Cabin Filter
The air that enters the vehicle’s air conditioning system is filtered by a cabin air filter. The filter can eventually become clogged since it gathers all of the dust and contaminants that enter the user area.
Additionally, a clogged cabin air filter affects the cooling efficiency of the air conditioning system. It is advised to regularly inspect and replace the cabin air filter.
A malfunctioning air conditioning control unit
Another common reason why your AC is not blowing cold air is a malfunctioning air conditioning control unit. When the air conditioning control unit malfunctions, it can give the blend door actuator the wrong signal, causing it to blow hot air instead of cool air.
Damaged AC condenser
Heat is transferred from the evaporator inside the vehicle through the condenser, which is installed at the front of the vehicle.
The AC condenser is typically installed in front of the radiator, putting it in a position where it is highly susceptible to damage from flying stones and other objects.
This frequently results in the AC condenser starting to leak refrigerant, causing the refrigerant to flow out.
A Faulty AC Pressure Switch
Your car AC may not be blowing cold air as a result of a faulty AC pressure switch. The high-pressure side and the low-pressure side of the air conditioning system are controlled by two AC pressure switches in your car for safety reasons.
For safety purposes, the AC compressor won’t continue to cool the system if the pressure rises too high.
The AC compressor will also stop working if the pressure drops too low. Your AC system won’t work at all if this AC pressure is faulty since it may send the compressor faulty signals to stop, even if it shouldn’t.
Faulty AC compressor clutch
Inside the air compressor, certain car compressors utilize a clutch. When you turn on the air conditioning, the clutch connects the air compressor to the pulley, which is powered by the serpentine belt. By causing the AC compressor to spin, the AC system is powered.
The AC compressor may not even turn on if this clutch is too worn. In many AC compressors, this clutch can be changed, or you can even remove shims to make the clutch work a little bit harder.
A malfunctioning AC compressor
Not only may the AC compressor clutch be harmed, but the compressor could also fail which will cause the car AC not to blow cold air.
For the air conditioner to function properly, the compressor must pump refrigerant all through the system. Your AC system will blow hot air if the pump fails and eventually stops pumping at all.
There may be metal pieces all over the place if the AC compressor fails; therefore, you frequently have to flush the entire AC system afterward.
Damaged condenser fan
A damaged condenser fan can also be the reason why your car AC is not blowing cold air. For proper heat removal, wind must pass through the condenser. We require a fan for this that can operate in place of the wind at slower speeds.
The AC system at lower speeds could have an issue if this fan breaks down. There may be an issue with the condenser fan if you find that your air conditioner is running at higher speeds but not at lower speeds.