u/FrozenSoul39

Hey! 3rd year apprentice. Mainly installs not a lot of service. I just flushed my Navien 240A on Sunday. Neglected a little, it’s been installed for 3 years now and this was its first flush, it was installed with a softener I keep up with. Yesterday morning it’s T&P popped. I closed it after noticing, ran some fixtures trying to recreate it and it’s not done anything and ran fine and it’s not popped again since. Any ideas or situations of the same issue?