Can I withdraw funds from a CD account via check or ACH?

Answer 1

Yes, most banks will allow you to do either. You will have an early withdraw penalty on the interest though if you do it before maturity

Answer 2

Doubt it. Go into your bank in person.

Answer 3

No. It has to be transferred to a savings or checking account first. Then you can. Same way the other way. It must go into the savings or checking, then the CD.