Answer:
Cold head and feet; round as a ball; always turning around myself.
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
I am commonly abbreviated to H
A man shaves several times a day, yet he still has a beard. Who is this man?
I pass before the sun but make no shadow. What am I?
In your fire you hear me scream! Creaking and whining yet I am dead before you lay me in your hearth.