Lord of the temple is a swayambumurthi gracing eastward.Mother Periyanayaki graces facing south. There are shrines for Lord Vinayaka, Nandhi, Lord Dakshinamurthy, Lingodhbava, Brahmma, Nagar,
Lord Muruga with His consorts Valli and Deivanau, Navagrahas the nine planets, Chandikeswara, Bhairava, Surya-Sun, Chandra-Moon and a separate shrine for Vancha Ganapathi.
As Mahalakshmi worshipped Lord Shiva in this temple, prayers bring prosperity to the devotee. Maha shivarathiri is celebrated here.
The temple has special significance attached to Uthiratadhi star. Sages Agir Budhan, Angirasa, Agni Purandhaka and divine sculptor Viswakarama are born in this star. They come here on all monthly star days to worship Sahasra Lakshmeeswarar to perform pujas in their invisible form, according to belief.
Hence the starrers are advised to visit the temple as often as they can or at least on their annual star day, perform Homas with a nivedhana of sweet pudding made with cashews, ghee, badam, grapes and honey for relief from problems as debt burden and progress in efforts stalled due to reasons known or unknown.
As Fire God and Sun also known as Ayan worshipped here, the place is named Theeyathur. Thee in Tamil means fire. As hot Agni worshipped here, those suffering from heat related diseases worship here.
Uthiratadhi starrers pray seeking solutions to their problems. Devotees seek the blessings of Lord for relief from debt burdens and child boon and prosperity.
People perform special abishek, archanas and Homas and offer Sweet Pudding with cashews, grapes, honey and Badam as nivedhana to Lord and Mother and distribute it to poor.