1. Electrical Issues
- Circuit breaker tripped: The AC unit's circuit breaker may have tripped due to an electrical overload or a short circuit.
- Incorrect voltage: If the voltage supplied to the AC unit is too low or too high, it can lead to improper operation.
2. Refrigerant Leak
- Low refrigerant levels: If the refrigerant level in the AC system becomes too low, the unit may not be able to cool the air properly and the compressor will eventually shut off.
3. Compressor Failure
- Internal damage: The compressor is the heart of the AC unit and if it fails, the unit will not be able to cool the air at all.
- Overheating: The compressor can overheat due to several reasons such as blocked airflow or a faulty capacitor, causing it to shut off.
4. Faulty Thermostat
- Incorrect settings: If the thermostat is set too high, the AC unit will not run as often and the indoor blower may continue to run, circulating warm air.
- Malfunction: A malfunctioning thermostat can provide incorrect readings or fail to communicate properly with the AC unit, leading to improper operation.
5. Damaged Fan
- Fan motor problems: If the condenser fan or evaporator motor fails, it can prevent the AC from adequately releasing heat and result in the indoor blower running continuously.
6. Clogged Air Filter
- Blocked airflow: A clogged air filter can restrict airflow over the evaporator coil and cause the AC system to shut down due to overheating, while the indoor blower keeps running.
7. Malfunctioning Control Board
- Faulty components: The control board is responsible for managing the AC system's functions. If it fails or has faulty components, it can disrupt the communication between different parts and lead to the outdoor unit shutting off while the blower operates.
8. Faulty Sensors
- Incorrect readings: Faulty sensors, such as the temperature sensor, can provide incorrect information to the AC system's controls, causing the unit to shut down while the blower runs.
These are some potential causes for the issue you described. It's recommended to consult with an HVAC professional to properly diagnose the problem and take the appropriate repair actions.
