VCRIGHT-A278
VCRIGHT_a278_hvacPtcHeatingUnavailable
Also written as VCRIGHT_A278 / VCRIGHT A278 / VCRIGHT_a278_hvacPtcHeatingUnavailable / vcright_a278_hvacptcheatingunavailable
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does VCRIGHT-A278 mean?
Tesla alert code in the Vehicle Controller Right (VCRIGHT) module. Cabin heating is unavailable. Check context data for this alert and/or VCRIGHT_a262 to determine exact issue PTC heater is not reporting on CAN, or is receiving low voltage from the HV battery PTC heater is on CAN, and is receiving the correct voltage from the HV battery Cabin heating will not function.
Original Description
Cabin heating is unavailable. Check context data for this alert and/or VCRIGHT_a262 to determine exact issue PTC heater is not reporting on CAN, or is receiving low voltage from the HV battery PTC heater is on CAN, and is receiving the correct voltage from the HV battery Cabin heating will not function.
Affected Tesla Models
What You May Notice
- Vehicle Controller Right alert: Cabin heating is unavailable. Check context data for this alert and/or VCRIGHT_a262 to determine exact issue PTC heater
- Some features (climate, lights, or charging) may be temporarily unavailable
- Alert notification in the Tesla app
How to Diagnose and Resolve
- 1 Perform a soft reboot (hold both scroll wheels)
- 2 Check for pending OTA software updates in Controls > Software
- 3 If multiple features remain non-functional, schedule a service appointment
Severity Notes
VCRIGHT-A278 is an Alert in the Vehicle Controller Right system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.