Try to protect
The child can be frightened when you open an umbrella when earns the vacuum cleaner or the siren begins to sound, the dog will begin a bark, the train will hoot, even leaves will begin to rustle.
Try to protect the child from frightening subjects until he gets used to them.
If he is frightened by the vacuum cleaner, do not use it within several months the child of the house, at least, so far.
And then turn on the vacuum cleaner when the child is in some distance.
Fear of bathing..