Rotten water smell like sewage from water heat baseboard

Moved into the new house, my bedroom has the rotten water smell like sewage gas from the corner section of the water heat baseboard. How can I fix this aweful smell? Do I need to replace the water heat baseboard in the bedroom? How much will it cost? Or can I do it myself? It has been bordering me since I moved in, still not able to enjoy the new house. Could you please help? [:0(

 

I will assume that the house is not new construction but that you are new to living in it, correct?

With nothing more to go on I would say the most likely problem is that you have a leaking vent valve. Boiler water is usually stinky and also disgusting looking.

Why not post a few pictures of where the smell is and also post some pictures of the boiler itself and the nearby piping?

To post pictures you need to first upload the pictures to a photo hosting site such as photobucket.com or villagephotos.com. and then post the public URLs for the pictures (or album) here. More pictures are always better than fewer. Please have CLEAR pictures and have both close up pictures and ones from a far enough distance that we can see how the various parts are interconnected

 

I might not be so quick to blame the heater myself... there are a lot of 'what ifs' to think about. Examples... what if there is an external water leak of some sort that is dampening the structure and causing a mold problem inside the wall? What if some 'critters' have gotten inside the wall and not gotten out? What if the previous owner had some critters that left behind some odors? What if there's a leaking plumbing pipe inside the wall, and it really IS sewer smell?

I guess what I'm saying is to consider the 'big picture' rather than focusing on the heater. I'm not saying it ISN't the heater, but better to put the wide angle on the problem at this point.