What happens if the temperature control switch fails in the AUTO position?

If the temperature control switch fails while in the AUTO position, the system will not be able to adjust temperatures properly. In this mode, the automatic temperature control relies on sensors and inputs to maintain the desired temperature by regulating airflow and heating or cooling as necessary. A failure of the switch means that the system cannot receive the correct commands to adjust temperatures based on cockpit conditions, resulting in a situation where temperature adjustments can no longer occur.

The inability to adjust temperatures can lead to discomfort for the crew and passengers, as they may be subjected to conditions that do not change in response to the environment. This failure impacts the overall thermal management within the cockpit, which is crucial for maintaining a comfortable and safe operating environment. In this case, the system would essentially be rendered ineffective in managing temperatures, confirming the correctness of the answer.