The first things you should check are the correct supply of electricity water and gas to the water heater.
Bosch on demand hot water heater troubleshooting.
When the error code appears on the bosch heater s lcd display the reset button sometimes leads to an error removal but if it doesn t work the instructions below might help troubleshoot the problem.
Make sure that the shut off valve is not closed.
Troubleshooting tech support for bosch gas and electric water heaters symptoms solutions for bosch north america contact customer service fhp commercial products bst 2 0.
Gas tankless and electric water heaters from bosch.
Warranty labor request form.
Error code a2 problem with the flue gas limiter.
Inspect the water supply.
All labor reimbursement requests must be submitted on the form provided.
This comes at an added cost and may not be available with all systems.
Problems with water flow.
Pipe joints should not be sealed with plumber s glue.
Technical support troubleshooting troubleshooting videos parts diagrams service bulletins warranty labor.
Contact customer service general product info inquiries.
Accessories radiators air handling units and cased coils geothermal accessories boiler controls indirect hot water tanks service.
For systems without a recirculation system hot water can be provided in just seconds depending on the distance of the tap from the tankless water heater.
This is the place for troubleshooting and service information on every product we offer.
Check the gas burner and does the flame rod generate sparks when the unit is turned on.
If not check this article that deals with the ignition failure problem.
To provide immediate hot water to a tap a tankless hot water system must be equipped with a recirculation solution.
Bosch aquastar tankless water heater repair parts for bosch and bosch aquastar gas and propane water heaters special information covid 19 statement free shipping on orders over 200.
This list includes some of the more common problems that people have with tankless hot water heaters but it is not all inclusive if you don t see the tankless water heater problem you re having here or if you need technical support with your water heater please visit our help desk to schedule an appointment or call us at 866 356 1992.
Inspect the plumbing for restrictions.
Connect the supply line to the blue inlet on the water heater.
Error codes are the indicators of the problems inside the water heater.
Bosch online technical support form.