Heat Sink Paste Application for Bosch Electric Tankless PCB Board Replacement

This will cover a little more in depth application of the heat sink paste that needs to be applied to the back of the triacs on the pcb board for the Bosch High KW electric tankless water heaters.  When you are replacing the PCB control board on a Bosch electric tankless water heater for the high KW units such as the AE-115/WH17 or the AE-125/WH27 you want to make sure to apply the heat sink paste that comes with the new PCB board.

The heat sink paste will come in a small syringe type applicator and a small amount will need to be applied to the back of each triac.  The triac's are the small black squares to the left of the PCB board labeled by the letter G in the picture below.  The Bosch AE-115/WH17 will have 4 small black triac's to the left of the PCB board and the AE-125/WH27 will have 6 small black triacs to the left of the PCB board.  There are service bulletins that show the PCB board replacement and heat sink application.  Bosch Service bulletin EP-22 will show the PCB board replacement for all the newer high KW units with polymer modules.    Bosch Service bulletin TWH-E2-22 will show the PCB board replacement for all the older high KW units with copper canisters.

For further questions or to purchase a new PCB control board visit this link:

http://www.globaltowne.com/shop-by-category/bosch-tankless-water-heaters-spare-parts.html?spare_part_type=162

or please call GlobalTowne at 888-726-9752 or visit our website.

Bosch 1000P/1600P/1600H Service Bulletins

Bosch has released a series of Technical Service Bulletins for the Bosch 1000P, Bosch 1600P and Bosch 1600H tankless water heaters. These Technical Service Bulletins can be extremely helpful for installers and home owners who are installing the Bosch 1000P, Bosch 1600P and Bosch 1600H gas tankless water heaters.

Some of these Service Bulletins apply only to the Bosch AquaStar 1600H. Many, however, also apply to the Bosch 260PN, 425PN and 425HN tankless water heaters. See the Models listed in the header of each Service Bulletin to determine if the bulletin applies to your specific Bosch water heater.

Bosch 1000P, Bosch 1600P and Bosch 1600H Technical Service Bulletins:

• CT-01 Temperature fluctuation troubleshooting
• CT-03 Checking the draft
• CT-04 Checking gas pressure
• CT-05 Negative air freeze prevention
• CT-07 Lowering temperature
• CT-08 Descaling the heat exchanger
• CT-09 No spark with hot water flow (1600H Only)
• CT-10 Spark, no pilot flame (1600H Only)
• CT-11 Winterizing for seasonal use
• CT-12 Cleaning inlet filter
• CT-13 Removing and cleaning burners
• CT-14 Unlocking regulator
• CT-21 Replacing heat exchanger
• CT-22 Cleaning and replacing pilot assembly
• CT-23 Water valve rebuild
• CT-24 Replacing eco/temperature limiter
• CT-26 Replacing electro valves (1600H Only)
• CT-27 Replacing control box (1600H Only)
• CT-29 Cleaning and Replacing hydro generator (1600H Only)

Steve

Bosch 2400ES/2700ES Service Bulletins

Bosch has released a series of Technical Service Bulletins for the Bosch 2400ES and Bosch 2700ES tankless water heaters. These Technical Service Bulletins can be extremely helpful for installers and home owners who are installing the Bosch AquaStar 2400ES or Bosch AquaStar 2700ES gas tankless water heaters.

Many of these Bosch Service Bulletins also apply to the Bosch Pro 715ES, C800ES, C920ES, C920ESC tankless water heaters. See the Models listed in the header of each Service Bulletin to determine if the bulletin applies to your specific Bosch water heater.

Bosch 2400ES and Bosch 2700ES Technical Service Bulletins:

• G3-03 Measuring Gas Pressure
• G3-05 Checking and replacing temperature sensors
• G3-06 Winterizing and Freeze Prevention
• G3-07 Control Unit Diagnostics
• G3-12 Measuring and adjusting CO2
• G3-13 Descaling the heat exchanger
• G3-14 Installing Wall Thimble On Uneven Surface
• G3-15 Fan speed adjustments
• G3-22 Replacing heat exchanger
• G3-23 Cleaning and replacing ignition group
• G3-24 Replacing the control unit
• G3-26 Removing and Replacing Water valve
• G3-28 Replacing gas valve

Steve