Bosch water purifier cover keeps dripping water what tondo

sounds like pressure relief valve is stuck closed free of or replace

you can rebuild the flow control valve to prevent this.there is also a new flow control valve that has supersceded some of the older ones.

Get more air to the unit.
http://waterheatertimer.org/pdf/Bosch_Ventilating_tight_houses.pdf
http://waterheatertimer.org/pdf/Attic-Ventilation-and-Pilot-Outage-in-Gas%20Water-Heaters.pdf
Don't use household vent fans.
Trim back trees, and move stuff away from front of water heater and from around vent pipe.
Pilot outage can be caused by tightly insulated house, poor upward draft on flue, other vents or vent fans drafting air upward and causing downdraft on water heater, wind coming down flue pipe, water dripping down flueway, dirty combustion parts, clogged pilot orifice, failed thermocouple, failed gas control valve, low gas pressure, water or air in gas line, super hot location ... or combination of more than 1 thing.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Open following link for Bosch tankless troubleshooting resources, including Bosch contact information, typical manuals, error codes, tech support, parts, fuel-saver calculator, service bulletins, water heater forum, fixya links, disclaimers, and links for finding service technician.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Read manual cover to cover, make sure tankless receives yearly maintenance as outline in manual.

Add a comment with your experience so others with same-similar problem can benefit.

Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

You posted under Bosch tankless water heater.
The suspect is probably gas supply, gas valve, or gas related part inside tankless unit.

Before calling service technician, open following link for Bosch tankless troubleshooting resources, including Bosch contact information, typical manuals, error codes, tech support, parts, fuel-saver calculator, service bulletins, water heater forum, fixya links, disclaimers, and links for finding service technician.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Read manual cover to cover, make sure tankless receives yearly maintenance as outline in manual.

Add a comment with your experience so others with same-similar problem can benefit.

Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Freezing water inside pipes can damage your water heater.
you should lag the pipes and if not fitted you should fit a cover to the pipework.
Is the unit outside? if so here is a link to a manual with some info on Bosch water heaters
http://www.boschhotwater.com/Portals/7/TechManuals/PipeCover_10.2009.pdf

Open following link for Bosch tankless troubleshooting resources, including Bosch contact number and link for finding service technician, etc.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Read manual cover to cover, make sure tankless receives yearly maintenance as outline in manual.

Add a comment with your experience so others with same-similar problem can benefit.

Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

There is likely an onboard relay stuck in the open position.

This is a gas appliance and should be serviced by an authorized BOSCH repair center to avoid potential catastrophe.


Thanks!!
2

You need a new thermocouple. Its the little stick like thing that the flame heats up to tell gas valve to open.