I bought a woodmaster boiler a year and half ago with no problems until about a month ago. From the frost in the ground the cement slab moved and the pex pipes pulled apart. We replaced them and got it up and running again. Then we noticed the light going out due to the lose of water. So we added water and a few weeks later we had to add more. We now are adding water sometimes up to twice a day. It isn't a lot of water but enough to make the light go out. We contacted our dealer and he told us to replace the flapper which we did and we are still having problems. Check the door and everything seems to be sealed well. Yesterday we noticed water coming from the vent pipe. The dealer isn't much help and I guess we are going to have to call the manufac. Just wondering if anyone has any other ideas.