1723 Cloverfield Boulevard, Santa Monica, CA 90404Phone 310-828-9798 |Fax 310-453-7610 |bpm@bpmcpa.com

Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-188381, 333-208784, 333-227169, 333-232402, 333-265967 and 333-273927) and Form S-8 (Nos. 333-184884, 333-204129, 333-228267, 333-238613, 333-257659, 333-264492 and 333-271042) of ClearSign Technologies Corporation of our report (which contains an explanatory paragraph relating to the Company’s ability to continue as a going concern as described in Note 1 to the financial statements) dated April 1, 2024 relating to the consolidated financial statements, which appears in this Annual Report on Form 10-K.

/s/ BPM CPA LLP

March 29, 2024

Santa Monica, California

bpmcpa.com