The bath is finished. The dryer clicks on and your dog tries to escape. The noise, air movement, and warmth arrive all at once. You don't need to teach them to tolerate a full blast while their coat is wet.
For today's bath, use a towel and a warm, comfortable room if that is suitable for your dog's coat and health. Ask your veterinarian or a skilled groomer if the coat needs more thorough drying, especially if the dog has skin problems or a dense coat. Avoid hot air and never point airflow at the eyes or ears. A dog should not have to be held down beside a loud machine just to finish grooming.
Begin with the dryer nowhere near them
On a dry day, put the switched-off dryer in the room at a distance. Reward your dog for noticing it calmly and let them leave. Later, turn it on briefly in another room on a cool, low setting and offer treats or play while your dog can still move freely. If they freeze, hide, or refuse food, make it quieter or farther away next time.
Once the sound is easy, introduce the movement of air without directing it at the dog. Only then try a moment of gentle airflow on an easy part of the body, followed by a reward and a break. Work in tiny steps over several sessions. If the noise remains a problem, towel drying or professional grooming may be the better answer, ask a professional rather than improvising unsafe heat or restraint.
The point is not to make your dog love the dryer. It is to meet their coat-care needs without making each bath a frightening event. If the sound is part of the worry, see the noise-fear guide for a broader approach, towel drying is fine while you work out what your dog tolerates
Sources: PetMD: Tips for Getting Your Dog Comfortable with a Dog Dryer. Dogs Trust: What to do if your dog is scared of loud noises.