An electric car may not start charging at home because a schedule or charge limit is set, the car or charger is waiting for a session, or the home power path has a problem. Check those in order using your equipment's instructions. Stop if charging equipment is visibly damaged, an outlet is warm or discolored, or a breaker trips frequently; get the appropriate professional help.
What should I check before trying again?
As a practical safety step, stop using visibly damaged charging equipment and contact its manufacturer for service. Tesla's Gen 3 Wall Connector manual says not to use its unit if it is defective, cracked, frayed, broken, otherwise damaged, or fails to operate; it directs users to contact Tesla for repairs.[1]
As a practical safety step, stop trying that circuit if a wall outlet is warm or discolored, or a breaker trips frequently, and contact a qualified electrician. The National Fire Protection Association lists warm or discolored outlets and frequent breaker trips as reasons to call an electrician or landlord.[2]
Could a charging schedule or limit be stopping the car?
A charging schedule can delay when charging starts, and Tesla's Model S manual says the selected charge limit applies to immediate and scheduled charging sessions.[3] Check the charge limit and scheduled start time in your car or its app, using your vehicle's instructions.
Chevrolet's home-charging guide says a flashing blue indicator on the vehicles it covers means delayed charging is set; check “Charge Later” or “Home Schedule” in the Charging app.[4] Those are Chevrolet examples; use your vehicle's manual to interpret its indicator colors and control names.[4:1]
Is the connector or charger waiting for the car?
Check that the charging cable is connected, then read the message or indicator on the car and charger using their own guides. On a Tesla Gen 3 Wall Connector, “Waiting for vehicle” means the charger is plugged in and a session still needs to be initiated in the vehicle or app.[5]
If the equipment reports a fault, follow its manufacturer's instructions or contact the manufacturer. Once a session starts, the separate guide to how long an electric car takes to charge explains what affects its duration.
Could the home power supply be the problem?
Home power and the circuit are a separate part of the charging path. In the United States, the Department of Energy's Alternative Fuels Data Center says residential Level 2 charging requires a 240 V outlet or available service.[6] Ask a qualified electrician about the installation or circuit if the home power path is in doubt.
Can another charger help narrow down the problem?
For PCS_a016 in Tesla's North American Model S manual for 2021-or-newer cars running software version 2026.38.3, investigate any accompanying alert that identifies the AC charging condition first.[3:1] If using a Wall Connector, Tesla recommends trying different equipment such as a Mobile Connector on a separate outlet; if charging starts, the Wall Connector was likely the issue.[3:2]
Tesla says PCS_a016 stops AC charging but should leave DC fast charging and Supercharging available.[3:3] If the alert persists at multiple locations with different charging equipment, Tesla recommends scheduling service; if the original outlet or Wall Connector is implicated, it recommends an electrician inspect the wiring connection.[3:4]
Tesla, “Gen 3 Wall Connector Manual” (read 2026-11-09). Wall Connector safety instructions ↩︎
National Fire Protection Association, “Electrical Safety: Checklist” (read 2026-11-09). Home electrical safety checklist ↩︎
Tesla, “MODEL S” 2021+ Owner's Manual, North America, software version 2026.38.3 (read 2026-11-09). Model S owner's manual ↩︎ ↩︎ ↩︎ ↩︎ ↩︎
Chevrolet, “Learn How to Charge EV at Home | Vehicle Support” (read 2026-11-09). Chevrolet home charging guide ↩︎ ↩︎
Tesla, “Operating and Error States” (read 2026-11-09). Gen 3 Wall Connector status guide ↩︎
U.S. Department of Energy, Alternative Fuels Data Center, “Alternative Fuels Data Center: Electric Vehicles for Consumers” (read 2026-11-09). Home charging requirements ↩︎