Arrived on site to perform an annual tune-up on a Bosch propane boiler. Cleaned the burner, heat exchanger, igniter, flame sensor, neutralizer and condensate trap. Inspected the expansion tank, relief valve, combustion, venting, and overall hydronic system operation. Replaced worn burner and heat exchanger gaskets. Bubble-tested the gas line and checked carbon monoxide levels; no leaks were found. Verified proper operation, and the system is working correctly at this time.
