Ahaz had closed the temple and had set up other centers of worship throughout the land (28:24-25). Hezekiah reopened the temple and cleansed it in preparation for reusing it (vv. 3, 5). Whereas the writer of Kings described Hezekiah's religious reforms in only one verse (2 Kings 18:4), the Chronicler devoted three chapter to them (chs. 29-31). Hezekiah wanted to rededicate the nation to God (v. 10).
"When there is a financial crisis, the first thing we think about is money. When there is a communications crisis, our prime concern is to learn how to talk the language of the modern generation. When there is a church attendance crisis, we make it our chief aim to get numbers up. If Hezekiah had responded to a military threat in a military way, the Assyrians would have understood that. Army would have been matched against army, with dire consequences for Judah. But instead he and his people first look up to God."79
Hezekiah carried out his clean-up job hurriedly to prepare for the celebration of the Passover (vv. 17, 26; 30:1). The Kidron Valley was a burial ground, so it was an appropriate place for unclean things. He first offered a sin offering to atone for the guilt of Judah (v. 21). Then he sacrificed burnt offerings of worship (v. 27) and led the people in worship (v. 29), joyful singing (v. 30), and willing sacrificial giving (v. 31). All the people of Judah who reverenced Yahweh rejoiced over the king's re-establishment of the temple services (vv. 35-36).