Why Does My Car AC Only Work In The Morning – Fix In 2024

Experiencing the frustration of my car’s AC functioning only in the morning, I delved into the issue. After personal research and troubleshooting, I discovered vital reasons and practical solutions to ensure consistent and reliable AC performance throughout the day.

Car ac cold in morning hot in afternoon?

The problem lies in the car’s cooling system, not the AC. Drawing outside air and low refrigerant affect morning performance, while faulty fans, clogs, or both impact afternoon cooling because the engine stays relatively cool in the morning.

Continuing to explore the post, let’s delve into the causes behind the perplexing issue of a car AC being cold only in the morning.

Reasons Behind AC Only Works In Morning But Not All Day:

Drawing from personal experiences, the enigma of why my car AC exclusively functions in the morning unfolded.

1. Low Refrigerant(Freon) Levels:

Insufficient refrigerant, often due to leaks from wear and tear or damage, can result in the morning-only effectiveness of your car AC. Identifying and fixing these leaks is essential for sustained afternoon performance.

Low Refrigerant(Freon) Levels

2. Dirty Air Filter:

AC is cold in the morning and hot in the afternoon and can also stop working if the air filter is dirty. The airflow into the air conditioner will be slowed if the air filter is blocked, which might lead to the system shutting down. The air filter should be cleaned often to ensure the AC system gets enough airflow.

3. Malfunctioning Compressor:

The heart of your car’s air conditioning system is the fan. It squeezes the coolant and moves it through the whole system. If the fan is broken, the air conditioning won’t work.

 Malfunctioning Compressor
source:car from jaoan

Electrical problems, everyday wear and tear, or damage to the compressor can all cause it to stop working, and the AC works in the morning but not in the afternoon. A trained AC expert can find and fix issues with the compressor.

4. Electrical Issues:

The air conditioning system in your automobile is powered by electricity; therefore, if there are any wiring issues, the system won’t function. Problems with electricity can be caused by a lousy wire system, a blown fuse, or a relay that needs to be fixed.

5. Clogged Condenser:

The condenser is full of junk and isn’t cooling down fast enough. The condenser is clogged with excessive debris and is not cooling down quickly enough. If you change the electrical switches and the problem disappears, that’s very strange, but it could mean that an exposed electrical wire is shorting out somewhere.

Car ac not cooling in afternoon? If the AC condenser is clogged with debris or dirt, it may not cool down the refrigerant efficiently. This can result in the AC taking longer to cool the air during the afternoon when temperatures are higher.

Clogged Condenser

How To Fix AC Only Works In The Morning?

Having faced the frustration of my AC working only in the morning, I discovered effective solutions:

1. Cooling System Maintenance:

The first step was to check and maintain the car’s cooling system. This involved replacing the thermostat (which controls engine temperature), doing a radiator flush (to clean out any blockages), and replacing the radiator cap.

2. AC Pressure Check:

A friend used gauges to check the pressure in the car’s AC system. They found that the pressures were too high, indicating a potential overcharge of refrigerant.

3. Vent Settings:

Check if the AC vent settings are set to draw in outside air (“fresh air” mode) during the morning and afternoon. If it’s set to this mode, it will bring in warmer outside air in the afternoon, making it feel like the AC is not working as effectively.

Ensure the vent setting is switched to “recirculate” or “max AC” mode to circulate and cool the air inside the cabin.

4. Regular Maintenance:

Your automobile’s air conditioning system must be maintained often to guarantee proper operation. At least once a year, a skilled AC tech should check on and service the AC system. It will help find any problems that could happen and fix them before they do so; car maintenance is essential.

5. Clean Air Filter:

Can dirty air filter stop ac working in car? The air filter should be cleaned or changed regularly to ensure the AC system gets enough airflow. It’s crucial to maintain the air filter clean since a dirty air filter might cause the air conditioner to shut off.

Clean Air Filter

6. Check Refrigerant (Freon) Levels:

Check the amount of refrigerant in your car’s air conditioning system often to ensure it is at the right level. The air conditioner might not function if there is not enough gas. A trained AC expert can check the amount of refrigerant and add more if needed.

7. Check For Leaking Refrigerant:

A leak may be the source of low refrigerant levels in your car’s air conditioning system. A professional AC expert can check for leaks in the AC system and fix them if they are found.

 Check For Leaking Refrigerant

8. Cleaning the Condenser And Radiator:

The most significant fix was cleaning the front part of the car where the AC condenser and radiator are located. Dirt and debris can accumulate in this area and block airflow, leading to the AC system not working correctly in hot weather. The air conditioning system’s performance improved by gently spraying water to clean these components.

9. Fix Electrical Issues:

A professional AC expert should fix electrical problems with your car’s AC system. Electricity issues might cause the AC to cease functioning, so it’s critical to identify and address any problems as soon as they arise.

Fix Electrical Issues

So, if you’re experiencing a similar issue with your AC not working well during hot days, you can tell your mechanic that you suspect it might be due to one of the following:

  • Overcharged refrigerant: Ask them to check the refrigerant levels and adjust if necessary.
  • Cooling system maintenance: Inquire about the condition of the thermostat, radiator, and radiator cap.
  • Cleaning the condenser and radiator: Suggest that they inspect and clean these components to ensure proper airflow for the AC system.

Car AC Stops Working When Hot Outside:

If your car’s A/C struggles in the heat, consider checking for leaks in the system, examining the condenser’s functionality, and ensuring the compressor is in good condition. These issues often contribute to cooling challenges during warmer weather.

AC Only Work Sometimes:

Is Your Car’s Ac Inconsistently Working? Intermittent AC issues, characterized by fluctuating temperatures, may result from a system clog, a malfunctioning compressor or compressor clutch, a faulty condenser fan, or a failed airflow direction actuator.

Car AC Compressor Working But Not Cooling:

Unclean air filters enable harmful particles to bypass the filter and enter the cooling system. Accumulated debris obstructs the air conditioner, disrupting heat exchange. This blockage leads to component failures, preventing the compressor from aiding the system in generating cool air.

AC Stops Working When Driving:

Chances are, your AC system has depleted its refrigerant charge. Alternatively, an electrical issue may be preventing the compressor from engaging. Another potential cause is an internal obstruction hindering the refrigerant circulation.


1. Can Humidity Levels Affect The Performance Of My Car AC In The Morning?

Humidity levels impact AC performance, affecting morning and later-day cooling. Increased humidity, particularly as temperatures rise, can challenge the air conditioner to maintain optimal cooling efficiency.

2. Can Driving Habits Or Patterns Impact The Performance Of My Car AC?

While driving habits contribute to AC performance, they aren’t the sole factor. Prolonged idling or low-speed driving may impact overall AC efficiency, potentially causing afternoon cooling issues.

3. Can Outside Temperatures Affect My Car AC’s Performance In The Morning Or All Day?

AC performance is influenced by morning coolness, making it easier to cool. However, as temperatures rise in the afternoon, the AC may face challenges in maintaining the same level of effectiveness.

4. How Can I Tell If My Car AC’s Compressor Is Failing, Causing It To Only Work In The Morning?

If your car’s AC compressor is broken and only works in the morning, the air from the vents might be warmer than it should be. You may also hear strange noises from the compressor or notice that the air conditioner takes longer than usual to cool the cabin.

5. Why Is My Car AC not Cooling In The Afternoon?

This problem may arise due to indoor or outdoor airflow restrictions, low refrigerant levels, clogged filters, or compressor malfunctions.

6. Why Does My Car AC Work At Night But Not During The Day?

Inspect the compressor belt tension. Significant temperature fluctuations between day and night may cause the belt to loosen slightly due to heat soak, leading to slipping and reduced compressor efficiency.

7. Why Is My Ac Not Cooling During The Day But Work At Night Time?

AC units that struggle during the day but function adequately at night may commonly suffer from low refrigerant levels. Sufficient for minimal cooling at night’s lower temperatures, it proves inadequate for daytime cooling demands.

8. Why Is My AC Warm At Night?

If your AC’s fan setting is “ON” instead of “AUTO,” the fan runs continuously, even when the air isn’t cooled. This can lead to warm air blowing from the vents intermittently as the cooling cycles are disrupted.

9. Why Does My Car AC Not Work In Hot Weather?

Possible causes of a malfunctioning car AC in hot weather include a faulty compressor or clutch engagement, often due to overheating, insufficient lubrication, or low refrigerant levels, which can impair cooling performance.

10. Why Is My Car Blowing Out Hot Air When The AC is On?

One of the primary causes of a car’s AC blowing hot air is a refrigerant problem, often stemming from low levels or leaks.


Having an air conditioner in your car is very helpful, but it can be unpleasant if it works in the morning but not in the afternoon. This problem could be caused by a lack of refrigerant, a dirty air filter, a broken compressor, electricity problems, or a clogged condenser.

These problems can be avoided with regular maintenance, like checking and fixing the AC system, cleaning the air filter, and checking the refrigerant levels. A skilled AC technician should also fix any leaks or problems with the electricity.

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