Zener diode value request on weathermaker 8000 control board #CES0110057-01

The zener diode Z1 on my control board #CES0110057-01 blew. Pulled it out, tested, its gone. My problem is the markings on it have completely worn away. Attached some photos of where its located on the board. Any help would be greatly appreciated. Thanks!

https://preview.redd.it/8ejh9c4jh0pf1.jpg?width=1600&format=pjpg&auto=webp&s=cb5fb5aa1d0e33fdc460136e2a18d946f7352152

https://preview.redd.it/vq8jigwjh0pf1.jpg?width=1600&format=pjpg&auto=webp&s=6977f40563050714562d0145b938239252e3d95d