Here is a call we get every fall in 48091: a brick ranch off Ryan Road, one pipe steam, boiler fires fine, front rooms hot, back bedroom barely warm. Quick observation first. The gauge sits near half a pound, the water line is steady, the burner looks clean. So the boiler is doing its job. The problem is out in the piping.
We follow the main to the end. On a lot of Central Warren ranches the main vent at the end of the line is missing, painted over, or someone screwed a radiator vent in where a main vent belongs. A radiator vent is far too small to let a whole main breathe. Steam cannot get in until the air gets out, and that air takes forever to leave.
So we replace it with a properly sized main vent, Gorton or Hoffman style, and check the radiator vent on that back bedroom while we are there. We also confirm the radiator valve is fully open and the radiator pitches back toward the valve. Half-open valves and back-pitched radiators are the two habits that keep one pipe systems noisy.
On the larger post-1958 colonials in Central Warren the same complaint usually has a different cause: a two pipe system with a trap stuck closed upstairs. That is why we look at the radiators and the piping before we quote. Same symptom, different system, different part, and a written estimate before any of it.