Hi everybody,

I just noticed some semi-dried sludge by the boiler and the water heater in
the basement. They seem to come from two copper drainage pipes, one
connected to the boiler and the other to the water heater. I don't know much
about home plumbing. What's going on ? Should I be concerned
?

I also noticed the boiler seems to come on every two or three minutes. I'd
hear a clicking/spark-like sound, following by the sound of air
blowing/flowing. After a minute or two it would change to a softer air
blowing/hissing sound. After another minute or two I'd hear the
clicking/spark-like sound again, and the whole cycle would repeat. Is this
normal ?

Thanks in advance.