Why is the electric vehicle charger showing a constant red light and not charging?

[DeTyler]

Here are the reasons why the electric vehicle charger shows a constant red light and does not charge: The charger is malfunctioning. The battery has a water loss issue. One of the batteries in the battery pack has a short circuit. Below are precautions for using an electric vehicle charger: Safe working environment: The charger should be placed in a well-ventilated and cool environment. Normal charging: The charger has a plastic casing with an integrated circuit board inside and is equipped with a cooling fan. When the charger is in charging mode, a red indicator light will be on, the red light stays lit, and the fan keeps running. Abnormal charging: The red indicator light will be on, but the fan does not spin, which also indicates a charger malfunction—either it won’t charge or the charger overheats, posing a serious safety hazard.

[DeIsabel]

Don't panic when encountering a red light on the charger without charging. Common issues usually stem from three areas. Poor contact in the power socket is the prime suspect—try switching sockets or checking if the plug is firmly inserted. Next, examine the charger itself; abnormal indicator lights may signal internal component failure, especially during summer heat when overheating protection is more likely to trigger. Finally, inspect the battery interface, as oxidized metal contacts or dust buildup can block charging signals. I recommend first cleaning the battery contacts with a damp cloth and trying again. If that doesn’t work, the charger may need replacement. Long-term use of low-quality power strips can also cause voltage instability, so it’s best to use a wall socket directly. Don’t forget to check the vehicle’s screen for error codes—some EVs display specific charging error types.