The Blower and Heater Controls and the A/C System Do Not Work

The blower and heater controls and the A/C system do not work

Diagnostic Procedure:

1. Probable cause: The climate control unit has malfunctioned, or has lost power or ground

2. Do the climate control power and ground circuit troubleshooting Climate Control Power and Ground Circuit Troubleshooting

Also check for:

- Climate control DTCs Initial Inspection and Diagnostic Overview
- Blown fuse No. 16 (7.5 A) in the driver's under-dash fuse/relay box
- Poor ground at G401
- Poor or loose connections at the terminals