How do I use the Comfort Control Dial? June 30, 2023 01:09 Updated The dial can be rotated left to right, and it can be clicked down. Related articles What does the Comfort Control Dial display do? What do AU, LO, MD, and HI stand for? What is the Comfort Control Dial and what does it display? What do C, H, S, F stand for? What are modes?