North Carolina does not have any state laws on rent withholding or repair and deduct remedies for tenants.
For an overview of North Carolina landlord-tenant law, including your rights to habitability, see http://www.ncdoj.com/files/consumer/landlord-tenant-booklet.aspx.
For state law prohibiting landlord retaliation, see N.C. Gen. Stat. § 42-37.1.
See the Laws and Legal Research section of Nolo for advice on finding and reading statutes and court decisions.
Also, check your local housing ordinances for any city or county rules that cover tenant rights when it comes to repairs. Contact your local building or housing authority. To find yours, call your mayor or city manager’s office or check your city or county website.