In this article, we will explore 15 frequent air conditioner issues and the steps to diagnose and resolve each one.
1. The Unit Won’t Turn On
- A: Check the power supply.
- B: Turn on the circuit breaker if it is off.
- C: Inspect the remote control batteries and timer settings.
2. Evaporator or Thick Pipe Freezing
- A: Clean filters and internal parts to improve airflow.
- B: Verify the appropriate turbine speed.
- C: Check the connection, position, and condition of the temperature sensors.
3. Low Evaporator Fan Speed
- A: Check the capacitor and electrical connections.
- B: Inspect the fan motor bearings for possible blockages.
4. Thin Pipe Freezing
- A: Detect and fix leaks in the system.
- B: Ensure the capillary tube is not blocked.
5. Capillary Tube Blockage
Ensure the capillary tube is at room temperature and shows no signs of freezing.
6. Compressor Not Starting
- A: Check the power cables and replace the start capacitor if needed.
- B: Verify if there is an open coil in the compressor by measuring electrical resistance between the pins.
7. Compressor Starts but Shuts Off Intermittently
- A: Verify the correct refrigerant charge and normal pressures.
- B: Inspect for possible current leaks between the coils and the compressor casing.
8. Presence of Non-Condensable Gases
Remove the contaminated gas, perform proper vacuuming, replace the filter, and recharge with clean refrigerant.
9. Low Condenser Fan Speed
- A: Check the capacitor, bearings, and clean the fan if necessary.
10. Deteriorated Pipe Insulation
Replace the insulation to prevent unwanted heat transfer.
11. Indoor Unit Dripping Water
- A: Inspect and clean the drain pipe.
- B: Clean the air filters.
12. Compressor Blocked Due to Lack of Lubrication or Wear
- A: Check the presence and color of the compressor oil.
- B: If the compressor is stuck due to wear, replace it.
13. Refrigerant System Leaks
Detect and repair leaks. Perform vacuuming if necessary and recharge the refrigerant.
14. Control Board Issues
- A: Check the connection, position, and condition of the temperature sensors.
- B: Inspect for swollen capacitors or signs of overheating.
- C: Confirm that the control board’s power LED is functioning correctly.
- D: Check the condition of the signal or communication cable between boards.
15. Low Performance or Intermittent Operation
- A: Clean the outdoor unit condenser.
- B: Clean the indoor unit evaporator and air filters.
