If the light on your air conditioner (AC) flickers when it's turned off but remains stable when it's running, there could be a few possible explanations:
Power fluctuations: When the AC is turned off, it may still be connected to the power supply, albeit in standby mode. Fluctuations in the electrical current can cause the light to flicker. These power variations might occur due to other appliances or devices on the same electrical circuit drawing power intermittently.
Faulty wiring or loose connections: Loose electrical connections or faulty wiring can cause intermittent contact between the AC and the power supply when it's turned off. This can result in the light flickering. It's important to have a professional electrician inspect and address any wiring issues to ensure safety and proper functionality.
Capacitor discharge: Air conditioners often contain capacitors, which store and discharge electrical energy to provide the necessary power for the unit to start. After the AC is turned off, these capacitors may continue to discharge residual energy, which can lead to momentary flickering of the light. This discharge process should be relatively quick and not cause prolonged or persistent flickering.
Electronic control board issues: The electronic control board in the AC manages various functions of the unit, including power supply and communication with different components. If there are issues with the control board, it could cause irregular behavior, such as flickering lights when the AC is off. A malfunctioning control board may require professional repair or replacement.
If you're experiencing consistent or significant flickering of the AC light, it's advisable to contact a qualified HVAC technician or an electrician to assess the situation. They can diagnose the specific cause of the issue and provide the appropriate solution to ensure the safe and reliable operation of your air conditioner.