Arrived on scene for a report of the upstairs zone not working. Upon arrival, the upstairs zone was operating properly and circulating hot water. Amanda reported an additional concern about an intermittent chime or alarm-like sound that she believed might be coming from a safety device. I was unable to clearly hear the noise, and we could only briefly recreate it right after the boiler shut off. Based on the timing and tone, I believe the sound may be originating from the chimney, which was serviced in May 2025. I secured a loose pipe hanger and checked all hydronic components but could not identify the source of the sound. I also noted that the tridicator gauge is reading approximately 10 psi higher than the actual boiler pressure. I performed annual maintenance on the Advantage oil boiler, including replacing the nozzle, oil filter, and pump strainer. I brushed and vacuumed the heat exchanger and flue pipe and found bird debris inside the heat exchanger, increasing my suspicion that
