Texas-New Mexico Power Company

577 N. Garden Ridge Blvd.

Lewisville, Texas 75067

EXHIBIT 32.3

CERTIFICATION PURSUANT TO 18 U.S.C. § 1350, AS ADOPTED PURSUANT TO § 906 OF THE

SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q for the period ended September 30, 2023, for Texas-New Mexico Power Company (“Company”), as filed with the Securities and Exchange Commission on October 27, 2023 (“Report”), each of the undersigned officers of the Company certifies, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

(1)the Report fully complies with the requirements of § 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	October 27, 2023	By:	/s/ Joseph D. Tarry
			Joseph D. Tarry
			Chief Executive Officer
			Texas-New Mexico Power Company
		By:	/s/ Elisabeth A. Eden
			Elisabeth A. Eden
			Senior Vice President, Chief Financial Officer and
			Treasurer
			Texas-New Mexico Power Company