On Tue, Feb 2, 2021 at 3:07 PM Erin Holohan Haskell <er
Embasy Onex combi boiler about 8 yrs old. Tuned up about 3 months ago. Running fine. About 6 days ago it started making a rumbling noise and running very rough. now it started not firing up and goes into L01 mode. I reset set it and fires up but very rough. Flame is jumpy not steady. The same noise was happening right before i changed the ignitors for the tune up. Any suggestions