Finally, a righteous king! Hahahahaha, just kidding. That would make this book interesting.
Nope, Ahaz is a Baal worshipper and practitioner of child sacrifice, at least, if Jerry Falwell's crack team of bible interpreters is to be believed. The forces of Syria and Israel team up to oust him, but are unsuccessful. The Syrians do manage to add to their territory and drive the Israelites out.
Ahaz sends gold and silver as a tribute to the king of Assyria, and asks him for help. He takes over Damascus and kills the king. Ahaz visits Damascus, sees an altar to the Damascene god, and commissions one just like it at home. He sets it up next to his altar to god, and uses the Assyrian one for sacrificing and the Israelite one for guidance. He further desecrates his altar to god by removing some of the tacky do-dads and the cover.
But he dies peacefully and his son Hezekiah takes over.