Why is my car AC still not cold after adding freon?

Author: John O'Conner  |  Last update: Wednesday, March 12, 2025

If the air still isn't cold after adding more Freon then there is probably another leak in the system. This is one of the most common issues for air conditioning problems. The compressor pressurizes the refrigerant and pumps it throughout the AC's necessary components.

Why is my car AC not cooling after adding Freon?

Check for bent / mashed fins and dust, dirt, leaves or other debris on the condenser / radiator surfaces, and in between the two. If the refrigerant used to charge the system contained oil (not all recharge cans contain it), it is possible the system is oil-logged and causing the compressor to hydro-lock and shut down.

Why is my AC still blowing warm air after recharge?

So if the refrigerant in your system doesn't get used up, what's happening to it? It's leaking out, that's what. If your A/C is blowing hot air, it's safe to say it's probably leaking. Adding a refrigerant with stop leak additive and O-ring conditioner could cure the leak.

How long does it take for AC to work after adding Freon?

What is the Time it Takes for Freon to Settle in a Car Air Conditioner? Freon settles in an air conditioner in a matter of minutes. Though, it depends on the type of air conditioner too. If the air conditioner is portable, it takes about 5-30 minutes for the Freon to settle.

Why is my AC not cooling even after gas refill?

the most common reason why your split and window AC is not cooling is because of unclean air filters. If the AC filter is unclean or clogged with dust and dirt, it might result in various problems. It could interfere with the proper working of the thermostat.

AC works BUT no cold air || AC dosent make cold || AC compressor comes on but no cold air || AC FIX

Why is my car AC cooling low even after filling AC gas?

The compressor is crucial to the AC system's circulation and pressurization of the refrigerant. Your air conditioner is not adequately cooled when the compressor malfunctions. A professional should inspect the compressor if you believe it is defective, and if it cannot be fixed, a replacement may be necessary.

Should I turn off AC if it's not cooling?

Yes, you should turn off your AC if it's not cooling.

How to fix car AC not blowing cold air?

How to Check Your Car AC
  1. Check to see if the cabin filter is clear; if not, replace it.
  2. Figure out the last time the condenser was replaced. ...
  3. When the AC is on, listen to hear the condenser hum as it spins. ...
  4. Make sure the condenser is free from leaves, bugs, or other debris.
  5. Check for leaks in the system.

What happens if you put too much freon in an AC system?

Hot air from the vents: It might sound counterintuitive, but too much refrigerant can cause hot air. Hot air coming from your vents results from the unit producing excess heat during its operations. The extra power associated with an overcharged system can cause this overheating.

Should your car be running when recharging AC?

Before releasing the refrigerant into the port, turn on the vehicle and turn the AC on to its max temperature. This will engage the compressor.

How to make car AC cold again?

3 Ways to Make Your Car's Air Conditioner Colder
  1. Clean or Replace the Cabin Air Filter. Your car's cabin air filter is responsible for keeping dust, pollen, dirt, and other pollutants out of your AC and heating vents. ...
  2. Check the Refrigerant Level. ...
  3. Inspect the Compressor. ...
  4. Visit Carmedix for Professional Car AC Repair.

How to tell if a car AC compressor is bad?

Warm Air from the Vents

If the compressor is fine, it will push cold air into the cabin of your vehicle. If you begin to notice warm or even hot air coming out of the vents, this is a clear indication that the compressor is not functioning properly.

Will AutoZone recharge my AC?

An AC leak will lead to warmer air from your vents over time. In most cases this can be fixed with a proven stop leak additive to seal up any leaks. When it's time for an AC recharge, turn to AutoZone.

Why is my car AC blowing hot air after putting freon in it?

It could be a number of issues, such as refrigerant leaks, faulty compressor or compressor clutch, blocked air vents, faulty thermostat, broken cooling fans, a blown fuse, electrical problems, a broken condenser and blower motor issues. All of these issues can cause your AC unit to stop operating properly.

Why is my car AC pressure normal but not cold?

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.

How to find a blockage in car AC system?

A very useful diagnostic aid is the “Feel Test”. As the test implies it is a matter of quite simply feeling tubes and components for temperature drops, indicating possible blockage location. By this stage you would be aware of what side of the A/C system should be hot and what side should be cold.

How to tell if an AC is overcharged?

Here are the typical symptoms of an air conditioner that has been overcharged:
  1. Rising Energy Expenses. ...
  2. Increased Outdoor AC Unit Heat Output. ...
  3. Icy Air Conditioner Coils. ...
  4. Loud Air Condition Compressor Noises. ...
  5. Unexpected Cooling System Failure. ...
  6. Uneven Air Conditioner Pressure.

Can too much Freon make a car AC not work?

The liquid refrigerant can damage and distroy a compressor. Inefficient cooling and the risk of catastrophic compressor damage by liquid in the vapor cycle causing hydrolock (trying to compress a liquid instead of gas). If too much freon is added, your air conditioner may not cool very well if at all.

How do I know if my AC has enough Freon?

Steps for Checking Refrigerant Levels
  1. Turn Off the AC and Remove the Cover. Turn off the AC unit and remove the cover to access the refrigerant level gauge or gauges.
  2. Locate and Remove the Access Panel. ...
  3. Attach Refrigerant Pressure Gauges. ...
  4. Interpret Pressure Levels. ...
  5. Add Refrigerant (if Necessary)

Why is my added freon still not cold?

If the air still isn't cold after adding more Freon then there is probably another leak in the system. This is one of the most common issues for air conditioning problems. The compressor pressurizes the refrigerant and pumps it throughout the AC's necessary components.

How much to fix car AC not blowing cold air?

AC repair costs can vary widely, depending on the cause of the problem and the type of vehicle. On average, car AC repair costs run between about $430 and $520. However, if you need a new compressor, you can expect to spend $1,300 to $2,500 or more.

Why would my car stop blowing cold air after putting freon in?

Another reason why the car ac recharged but not cold enough is the ac system is filled with dirt and debris over time. The evaporator is prone to collecting a lot of dirty things that can lead to tons of issues, including misblown AC.

Why is my AC running but not cooling in my car?

The most likely reason your air-conditioner isn't cooling is the car's air-conditioner is leaking. The car's AC system needs freon to lower the ambient air temperature and creates some needed cold air. Whenever there is a freon leak on your car there is no way to cool the air.

What is the first thing to check when the AC stops working?

Check these issues when the unit won't kick on: Check the thermostat and adjust the settings if it isn't set to Cool and an appropriate temperature setting to call for cooling. Examine the house circuit breakers for the AC unit and reset any tripped breakers. Check the air filter and replace the filter if it's dirty.

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