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What causes car ac compressor to stop start and dosent raech temperature?

Several factors can cause a car's AC compressor to stop starting or failing to reach the desired temperature. Here are some common causes:

1. Low Refrigerant Level: Insufficient refrigerant in the AC system can lead to poor cooling performance. When the refrigerant level is low, the compressor struggles to circulate enough refrigerant to absorb heat effectively, resulting in inadequate cooling.

2. Compressor Failure: The compressor is the heart of the AC system, responsible for compressing the refrigerant. If the compressor fails or experiences mechanical issues, it won't be able to generate the necessary pressure to circulate the refrigerant properly, leading to poor cooling.

3. Electrical Problems: Electrical issues, such as faulty wiring, damaged sensors, or a malfunctioning control module, can disrupt the communication between the AC system components and prevent the compressor from engaging.

4. Clogged Expansion Valve or Orifice Tube: The expansion valve or orifice tube controls the flow of refrigerant into the evaporator. If these components become clogged or restricted, the refrigerant can't properly expand and absorb heat, resulting in poor cooling.

5. Faulty Condenser: The condenser is responsible for dissipating heat from the refrigerant. A damaged or clogged condenser can impair heat transfer, causing the compressor to work harder and potentially leading to its failure.

6. Dirty Cabin Air Filter: A clogged or dirty cabin air filter can restrict airflow into the vehicle, reducing the effectiveness of the AC system and affecting temperature control.

7. Leaks in the System: Leaks in the AC system can cause a loss of refrigerant and reduce system pressure, leading to poor cooling performance.

It's important to note that diagnosing the exact cause of an AC compressor issue can be complex and may require professional expertise. If you're experiencing problems with your car's AC system, it's recommended to consult with a qualified automotive technician who can accurately diagnose and repair the issue.