The rods and gas valve are sticking. Flimsy plastic rod mounts that break off. It's all in this video.
My other videos:
Replacing a burnt-out heat-resistant sealing cord on a boiler • Меняем прогоревший уплотнительный термосто...
A Teplof KSVL-100 boiler burst • Лопнул котел Теплоф КСВЛ-100
Replacing the rubber membrane in a 750-liter expansion tank • Меняем резиновую мембрану в расширительном...
Weishaupt WM GL10 burner blocked. Loc.c 12 Loc.d 81. Leaky gas valve. • Блокировка горелки Weishaupt WM GL10 Loc.c...
Ziosab 500 boiler leaking https://youtube.com/shorts/Ef6yRnH1aD
More videos on my channel.