Bosch has a series of service bulletins for the older retail model Bosch Aquastar and also the compact models such as the 1600P & 1600H. These service bulletins can be very helpful with installation questions and when having issues with the Bosch tankless water heater.
Service bulletins can help with fixing an issue or with servicing your Bosch tankless water heater. Please keep in mind and be safe when working on a gas appliance. You can also contact Bosch directly or have you service agent contact Bosch technical support at 800-642-3111.
G3 Service Bulletins for GWH 2700 ES and GWH 2400 ES
CT Service Bulletins for GWH 1000 P, 1600 P, 1600 H
G2 Service Bulletins for GWH 2400 ES/ESO, 250SX/SXO
AquaStar 38B, 125 Series Gas Tankless
AquaStar VP Series Service Bulletins
AquaStar 240FX Service Bulletins