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If an air conditioner continues to blow warm air intermittently even after repairs have been made, there could be several reasons for this issue. Here are some common possibilities:

  1. Refrigerant Leak: One of the most common reasons for intermittent warm air is a refrigerant leak. The refrigerant is responsible for absorbing heat from inside your home and transferring it outside. When the refrigerant level is low due to a leak, the air conditioner may work initially but struggle to cool effectively over time, resulting in warm air being blown.

  2. Improper Refrigerant Charge: If the air conditioner was not properly recharged with the correct amount of refrigerant during the repair, it could lead to inconsistent cooling performance and warm air blowing.

  3. Faulty Compressor: The compressor is the heart of the air conditioning system. If it is failing or not functioning optimally, it may cause the air conditioner to blow warm air intermittently.

  4. Electrical Issues: Electrical problems, such as faulty wiring, loose connections, or a malfunctioning thermostat, can cause the air conditioner to behave erratically and blow warm air.

  5. Frozen Evaporator Coil: If the evaporator coil becomes frozen due to issues like airflow restrictions or refrigerant problems, it can hinder the cooling process and result in warm air being blown.

  6. Clogged Air Filter: A dirty or clogged air filter can obstruct airflow, leading to reduced cooling capacity and intermittent warm air.

  7. Outdoor Unit Issues: Problems with the outdoor unit, such as a malfunctioning fan, dirty condenser coils, or debris blocking airflow, can affect the system's overall performance.

  8. Sensor Problems: Some air conditioners have temperature sensors that could be faulty or misreading the room's temperature, causing the system to shut off prematurely or not turn on when it should.

Troubleshooting and fixing intermittent issues with an air conditioner can be challenging, and it may require the expertise of a qualified HVAC technician. They can thoroughly inspect the system, identify the root cause, and perform the necessary repairs or adjustments to ensure proper cooling functionality. If you're experiencing this problem, it's best to contact a professional HVAC technician to diagnose and resolve the issue safely and effectively.

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