Blocked Vent Switch

[johnmacin]

Hi,

My Crown boiler wasn't firing up, so I reset the BVS (blocked vent switch) and it resumed normal operation.

The documentation claims that if the BVS is tripped, I need to get a professional to check why. Is this really a concern? Can I just wait and see if it happens again?

Do these things ever trip liberally?

Thanks,
John

[jadnashua]

was it very windy or cold thatcould have made the vent not open or the air pressure change radically? The safetys are there for a reason, but can be fooled by outside sources sometimes. One of the pros may have some thoughts. It is always good to understand why a safety tripped - sometimes you can then ignore it, other times, it is a major red flag.

[johnmacin]

It was probably the coldest day of the season so far (NY). But I did see the damper right on top of the boiler did open.

Before bringing down a plumber, should I get a chimney sweeper? (Probably should do it this week for santa's sake anyway).