2 Kings 16:18-22

And the covered way for the Sabbath which they had built in the house, and the outer entry of the king, he removed from the house of the Lord because of the king of Assyria. Hezekiah Reigns over Judah

Now as for the rest of the acts of Ahaz which he did, are they not written in the Book of the Chronicles of the Kings of Judah?

So Ahaz lay down with his fathers, and was buried with his fathers in the city of David; and his son Hezekiah reigned in his place.