The most common cause of an AC system blowing warm air is a lack of refrigerant , though, you may also have a problem with your condenser. Other possibilities include a faulty compressor, broken cooling fans, or an issue in your electrical system.
Why is my AC still not cold after recharge?
If your car's AC isn't blowing cold air it might be low on refrigerant . In most cases you can recharge car AC systems yourself with a can of refrigerant, a charging hose and gauge from any auto parts store.
What are the symptoms of an overcharged AC system?
- Faulty Cooling. One of the most evident signs of an overcharged AC is faulty cooling. ...
- Noisy or Broken Compressor. The AC works in a cycle transforming compressed liquid coolant into a gas then back to its liquid state. ...
- High Pressure. ...
- Failing Engine.
Why is my air conditioner blowing out hot air?
When the cooling system's filter is dirty, the air conditioner cannot properly move air through the system . This issue strains your air conditioner and can cause an AC to blow warm air. ... If the existing air filter is dirty, replace it with a new, clean filter to see if the warm air issue resolves.
How long does it take for AC to be cold after recharge?
Refrigerant can leak slowly from your car's air conditioning system over time, but recharging the system so it once again blows cold air is an easy DIY task and takes just about 15 minutes .
Why did my car AC suddenly stop blowing cold air?
The first reason why your AC isn't blowing cool air is because it needs a freon recharge . ... The air conditioner condenser converts gas into a liquid, so if its broken or clogged, then your air conditioner won't blow cool air. Your air conditioner might also have issues if the system has some sort of blockage.
Why is the AC in my car not blowing cold air?
Air Conditioning Not Working in Your Car? ... The most common causes of broken air conditioning are leaks or compressor issues. If your air is blowing cool but not cold, the problem could be a clogged filter , cooling fan problem, radiator trouble, or it could simply be that you need to recharge your AC.
What happens if you put too much Freon?
A refrigerant overcharge alters the pressure inside the air conditioner and puts the compressor in danger. The Compressor: Excess refrigerant creates a danger called slugging . ... Eventually, slugging will cause complete compressor motor burnout—and that often means the whole AC must be replaced.
What happens if I overfill my Freon?
Overcharging the unit can cause permanent failure of the compressor , which is the pump for the refrigerant. ... When this happens, though, the system will power down and must be reset and the overcharged refrigerant removed before it will power back on.
What would cause excessive pressure on the high side of an AC system?
Higher than normal air pressure is usually a consequence of two situations. One, your AC system might be facing limited or no airflow through the condenser. This, in turn, might be a consequence of bad condenser fan motor . Second, the other reason for a high-pressure reading can be an overcharged system.
How do I fix my AC blowing warm air?
If your AC is blowing hot air, the thermostat may have been accidentally set to “heat.” If this is the case, it's easy to fix on your own. Simply flip the thermostat setting back to “cool” and see if the air conditioner begins to blow cool air again.
What if I put Freon in my car and it's still hot?
If the A/C works okay then gradually blows hot air after recharging, you might be dealing with refrigerant leaks. The safest and effective way to find leaks is to vacuum the system . Take your car to a qualified technician to have the system diagnosed.
Can AutoZone check my AC?
If you want to find the right AC solution for your car, you can either shop online or go to your local AutoZone . You can get your car's parts tested for free at AutoZone.
Can a dirty air filter cause car AC not to cool?
A dirty air filter restricts the flow of cold air , causing it to build up inside the air conditioner and lower the internal temperature. ... Uneven Cooling: Even if it's not enough to cause freezing, that restricted airflow isn't good for your air conditioner's cooling power.
