Hello all. I have an outdoor Heatmor 200 wood boiler. In the past two weeks, the ash in the fire box has become hard, concrete-like, with a greenish tint. At the same time, I am having a hard time trying to keep the temperature up. This situation is brand new; for the previous ten years the ash was soft, brownish-gray, and of a sandy consistency. Any idea what is going on here?
Thanks in advance for the help.
Thanks in advance for the help.