Performed diagnostic assessment on Bosch tankless water heater experiencing insufficient heating capacity for tub applications while maintaining adequate temperature (126°F) for sink fixtures. Completed comprehensive inspection of intake/venting system, ignitor, flame sensor, burner assembly, and heat exchangers, identifying heat exchanger scale buildup and control board errors. System exhibited shutdown issues following flush procedure. Scheduled follow-up service with technician Jared and arranged for comfort advisor to present repair/replacement options.
