I arrived at the customer's home to diagnose a no-heat issue on a Buderus propane boiler. Upon inspection, I found black soot around the pilot assembly and discovered that the pilot line had broken off at the nut. I replaced both the pilot line and the thermocouple and bubble-tested the pilot and gas line, which resulted in no leaks. I also checked CO levels, which were normal. I verified that the system was operating properly. I emailed estimates to perform an annual tune-up, replace the relief valve, and enroll the customer in Jerm's home care club.