Vegas 27.7 tankless not igniting
2019 Vegas 27.7. The tankless water heater stopped working recently - no known change. Was working fine previously.
-The fire icon on the bathroom panel that usually comes on during use does not.
-No other icons are displaying (fan/fire/flow)
-There are no errors or indications of any kind on the bathroom panel.
-Checked water pressure, both on city water and pump. Seems ok.
-Checked fuse - driver-side in hall at the bottom. Fuse ok.
-Checked gas. No change, other gas appliances (stove, external) work.
-Check heater on outside. No debris or obstructions.
Nearest fix-it is CW - not a fan.