Heating system is an H.B. Smith water boiler with a Carlin 100CRD Burner. 10-12 years old.
Reason for posting is to get some advice and information so I can be more knowledgeable if I need to talk to my serviceman. Initial problem was reset button popping out every week or so, and delayed starts. Tech cleaned parts, problem returned. Second tech decided to replace transformer. Different tech, so he also said he would check/clean things as necessary (I know he removed and checked the filter, don't know what else as I left him alone to work). He mentioned also when he changed the filter that air got in the line and the first time it fired up, it stalled so pump was primed.
After this, it was running, but sounded slightly different. Not serious enough to mention to him. But in the days after this visit, I am noticing how much louder it is upstairs. I finally realized something was very different as I was sitting at the table upstairs when it came on, and could feel vibration in the chair, floor, and table. Been here 4 years and this hasn't happened before. I checked it out and found the oil line nearest the burner vibrates a lot before it goes in the floor (but it could have always done that). That is the part that is vibrating to the touch, but the noise is deeper, and not as consistent overall. Has a "rar-rar-rar-rar" type of inconsistent running noise.
I have great experiences with these guys but I hate to call over something so subjective like this, so I have some questions: Can a new transformer alter the behavior and noise to this degree? Are there adjustments that would need to be done after a transformer install?
Also, the noise is louder and deeper, makes me think the flame pattern is different, or output is stronger, maybe that's causing it. Possible with a new transformer?
Question about the oil pump since the oil line feels like it's vibrating. This pump has run dry twice recently, once because tank gauge now gets stuck at 1/4 of a tank (I used to wait until almost 1/8 but I know better now!) Happened again after tank was filled, line was bled in both cases. But, I didn't notice any problem after those events. So can a pump cause vibration felt upstairs? Maybe when this tech checked the filter and mentioned it got air in the system, the last straw so to speak?
So should I call them again, wait and see, or is this to be expected with the new part? Anything I can check myself prior to calling?