EV Charger Not Working? Common Issues and How to Fix Them

When Your EV Charger Stops Working

An EV charger that refuses to work is frustrating, especially when you need your vehicle charged for the next day. Before calling a technician, many common issues have simple fixes you can perform yourself. This guide covers the most frequent problems reported by EV charger owners in the UAE and how to resolve them.

Problem 1: Charger Has No Power

Possible Causes

• Tripped circuit breaker (MCB): Check your electrical panel. The dedicated EV charger circuit may have tripped due to an overload or fault.
• Tripped RCD (residual current device): The safety device has detected a fault current. This is the most common cause of sudden charger shutdown.
• Loose connections: Vibration or thermal cycling can loosen wiring connections over time.
• Utility outage: Verify that other appliances have power. If not, the issue is with the mains supply, not the charger.

Solutions

1. Reset the MCB and RCD in your electrical panel
2. If the RCD trips again immediately, there may be a ground fault — call a licensed electrician
3. Check all cable connections at the charger and the electrical panel
4. If the charger has a built-in display, check for error codes

Problem 2: Charger Connects but Does Not Charge

Possible Causes

• Vehicle-side issue: The EV's onboard charger may have a fault or the charge port latch is not engaging
• Scheduled charging: Many EVs have timed charging set to start during off-peak hours
• Cable not fully inserted: The Type 2 connector must click securely into the vehicle port
• Charger firmware issue: Outdated firmware can cause communication errors with newer vehicles

Solutions

1. Check your vehicle's charging schedule settings and disable timed charging temporarily
2. Remove and re-insert the charging cable firmly until you hear/feel the click
3. Try charging a different vehicle to isolate whether the issue is with the car or charger
4. Check for firmware updates via the charger's app

Problem 3: Slow Charging Speed

Possible Causes

• Load balancing active: If your charger has dynamic load balancing, it reduces charging power when household consumption is high
• High ambient temperature: In UAE summers (45-50 degrees C), both the charger and vehicle may throttle charging to protect electronics
• Vehicle battery near full: EVs naturally slow charging speed above 80% state of charge to protect battery health
• Reduced grid voltage: Low mains voltage causes the charger to deliver less power

Solutions

• Schedule charging during cooler evening hours
• Ensure adequate ventilation around the charger
• Check if load balancing is reducing power and adjust settings if possible
• Have an electrician verify mains voltage at the charger during operation

Problem 4: App/WiFi Connectivity Issues

Possible Causes

• WiFi signal too weak at the charger location
• Router firmware or charger firmware needs updating
• WiFi password changed since initial setup

Solutions

• Install a WiFi extender near the charger location
• Re-configure WiFi settings via the charger's local interface
• Update charger firmware to the latest version

Problem 5: Error Codes on Display

Common error codes and their meanings:

Error	Meaning	Action
Ground Fault	Earth leakage detected	Check wiring, call electrician
Over Temperature	Charger too hot	Improve ventilation, reduce ambient heat
Communication Error	Cannot communicate with vehicle	Check cable, try different vehicle
Over Voltage	Mains voltage too high	Install AVR, contact utility
Under Voltage	Mains voltage too low	Install AVR, check wiring

When to Call a Professional

Call a licensed electrician if:

• The RCD trips repeatedly after resetting
• You smell burning or see discoloration at connections
• The charger makes unusual buzzing or clicking sounds
• Error codes persist after basic troubleshooting
• Physical damage to the charger, cable, or connector is visible

Frequently Asked Questions

Common troubleshooting questions for EV charger issues.