Quick question: the temp here in CMass has really dropped the last few
days and our steam radiators are obviously working harder and they are
making an odd sound. When the boiler cycles off and the pressure drops,
it sounds like there is water trapped in the vents and as air is pulled
back into the radiators they make a sizzling sound. This only seems to
happen in the mornings when the thermostat jumps up 6 degrees. Is this
because our system is running too high pressure? I was wondering if it
might also be due to an overfilled boiler. Is there an easy way to dry
the valves out? Any help or comments would be appreciated. Thanks.
When the boiler turns off and the steam starts to cool, it condensates,
or turns to water, and through the force of gravity goes back down to
the boiler. Naturally, it will also pull the air into the vent.
Probably you are hearing the little amount of condensate bubbling
inside the vent. It's normal.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.