We noticed our boiler leaking today. It seems it is coming from the overflow of our expansion tank. Can anyone offer any assistance as to why this could be happening?
To our knowledge, this has not happened with this boiler before.
EDIT: I managed to locate our invoice and it turns out the expansion tank and relief valve were also replaced along with the boiler 2.5 years ago.
UPDATE: We put a small container under the overflow pipe last night as a precaution, and this morning we found that the boiler leaked an additional 1/2 liter of water. In the meantime, we attached some scrap downspout pieces to route the leaking water into the floor drain instead of having to constantly empty the little container.
Boiler Model: Super Hot MG100-N-E-PS
Install Date: Sept 20, 2019