Honda Accord (with auto climate control) 2003-2007: Climate control buttons not working properly

If the climate control buttons work but not exactly right, the factory climate components may be out of sync. Follow these steps to re-sync the components.

Applicable part numbers: RPK-HD1101

1. Reinstall the factory radio.
2. Start the vehicle.
3. Ensure that the climate control buttons work properly.
4. Turn the fan speed up to the highest setting.
5. Turn the recirculation button off.
6. Turn the vehicle off.
7. Unplug the factory radio and then reinstall the RPK4-HD1101.
8. Reinspect for proper functionality.