Either it is possessed or it is housing an alien inside it.
The boiler was installed in 2013 for a pretty penny. It looks like the space station in my basement with the 5 zones. (Figures an alien would eventually find it.) A hot water tank was also installed.
Last April it started making these groaning noises really badly. We turned off the heat we were so scared. The heating company that installed it came out and did some stuff to it but after that things got warm so we never really heard it again.
Thanksgiving it turned cold and the furnace started groaning and shaking every day, but intermittently. Mostly it groans for a max of 15 minutes but usually for much less time. It has been getting worse/more frequent. I've been taking video of what has been happening to prove I'm not crazy and the alien is really down there.
Last Friday the heating company finally came and two technicians heard it from outside. They ran in. They took the front plate off the boiler, but it stopped. They did say that the fire flickered with the groans. They couldn't figure out what was wrong with it so they called in the guy who installed it. He came today. Of course, it didn't make the noise for him so he recommended a VERY expensive two pronged attack:
1. High Efficiency Tune Up. Major Pull Boiler, clean chamber, test combustion. (I've read on the forum here that the testing of the combustion is probably vital.) (A whole lot of money)
2. Flush Heat Exchanger and chemical clean boiler. (Another whole lot of money)
I asked him if they had called Burnham to see if this was a problem with the boiler, and they said that Burnham wouldn't do anything unless we did this stuff first.
I'm leaning towards saying go with the expensive high efficiency tune up check the combustion rather than the flush heat exchanger to see if that will work.
Here is a link to folders with videos and pictures of when it was happening. You can look at the timestamps on the files to piece together what happened when if you have to.https://1drv.ms/f/s!AjQrY6qGJstJjl7XkDE6SEAw8v4u
I tried to take pics of the zones, the gauge (once I realized it was there) and the control panel (but I don't think I knew which screens were most important.) If it happens again and you tell me what screen to look at and I'm here, I'd be happy to video it for you.
The only thing I know for sure is that it isn't tied to just one zone.
Here are some notes that I took while it was happening twice, but the video of the groans are probably better. I'm guessing the screen shots of the screen probably don't matter either? Because the noise doesn't show up on them.
Friday, December 1st:
Boiler got to 155 and it was shaking. Water? Started and then it immediately stopped. Boiler temp started going down from 155 rapidly.
Got down to 137. Then said preignition test. Then running. Immediately started climbing again.
Immediately started climbing.
Got up to 167.
Went down to 166 and stayed between 166 and 167. No sound.
Then post purge.
Boiler temp dropped.
Then said standby.
Boiler temps dropping to 150.
Went pack to prepurge at 150.
Drive light off. Energy save on. Boiler dropping.
Boiler at 155/154.
Then temp climbing.
This morning December 8th.
Running...noise happening (just for a minute or two because I was downstairs when it started).
Safe startup. Noise stopped. Prepurge. Purge.
Was at 146. Temp dropped to 133
Climbed to 146 and I grabbed more video because, I think, this was the first time that the noise happened again after the cool down cycle. It may have happened this way other times but this was the first time I was there when it happened.