Girard tankless fix

[s1000pre]

My girard on-demand stopped working. It showed a dark screen with no codes. First thought was to replace the flow sensor which didn’t correct the problem. I contacted Girard and found out that the water pressure can’t exceed 65psi. I lowered it to 60 and sure enough, it worked.

So, you need enough pressure to activate, and not too much pressure to deactivate. It has a sweet spot🙄