He turned his face to the wall - Contrast 1 Kings 21:4. Ahab turned in sullenness, because he was too angry to converse; Hezekiah in devotion, because he wished to pray undisturbed.
Related Commentaries of 2 Kings 20:2
2 Kings 20:2
2 Then he turned his face to the wall, and prayed unto the LORD, saying,