04/18/2026
Replaced burner assembly on Bosch tankless water heater due to operational issues. Unit was displaying a venting blockage error code. Inspected and verified venting and combustion air intake system; no obstructions found and airflow confirmed within acceptable limits. Further diagnosis determined burner assembly was faulty and causing improper combustion. Replaced burner assembly and verified gas supply and manifold pressure within manufacturer specifications. Performed combustion analysis and full system testing; unit is now operating safely and efficiently with no error codes.