[jmontblanc]

Hoping someone can be a hero on this one... not much online ~ not sure who/how to fix it; whenever the heating in my condo turns on, minutes later there is a rhythmic tapping (constant) in the ceiling on the opposite site of the condo along where the heating ends. I'm not sure what it could be (contracting due to hot/cold) but I need to figure out what it could be so I can find someone to fix it (probably involve opening up the ceiling?). Any input? Seems like a common problem but how is it obsolved? Thx

[hvac1000]

First of all exactly what kind of heating system do you have?

[KC13]

Sounds like thermal expansion of the duct system binding against the structure. May not be a quick fix-hero scenario.