20 Most Recent Bosch & Tankless LP Hot Water Heater Questions & Answers

If the thermocoupler is defective the gas to everything is shut off. The coupler is the bulb that sits ib the pilot flame If it doesn't heat up it will sense no pilot and shut the gas off. They don't cost much and are easy to change. Good Luck, Ned

It sounds like a bad flo switch. If not, then the problem is more likely in the mother board. Call Bosch back and ask for a supervisor right away. The peons sometimes are given advancement according to how many calls they handle, so they have a time crunch. Go right to the supervisor. Good luck!

Look for a water temp control on unit. Otherwise a lower temp can be attained by having a higher water flow to minimize temperature buildup in heating coil.

have a plumber check the installation as it appears that there is a temp control mixer in the kitchen line that should be in the bathroom line Many states and countries now have made it mandatory the full uncontrolled hot water cannot be used in a bath, shower, wash basin but has to limited to a max temp of 70 C to prevent burns to the skin

You either have a weak spark from your ignitor which needs replacing, a bad elec connection to the ignitor, or it needs to be repositioned nearer the burner. Check connections and try repositioning it before you install a new on.

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.

The S 13 BP is a simple unit that does not have a pilot light. It uses electronic ignition on demand, which is what you hear clicking. If there is no gas going through and you've verified there is gas to the inlet, then it has to be the gas control valve.

Solution for a code 10 or 99 (for my own reference as much as anything!)Hit change and the down arrow on the controller for 3 seconds. Wait for the controller to beep and display 00 before using the down key to display 93.Hit the On/Off button until 000 is displayed on the screen. Press change and down simultaneously and the controller should revert to the pre set temperature. Hey presto! Hot water!!!

overheat stat or fan

Make sure breaker is turned on. If that isn't it tell me model number and maybe I can help you more

Check gas pressures first especially on low setting. Ensure gas burner is clean get unit serviced if over 2 years old. Check or replace water flow sensor & clean inlet filter.

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

Before calling service technician, read manual for fault finding and possible solutions.
Read manual cover to cover, make sure tankless receives yearly maintenance as outline in manual.
http://waterheatertimer.org/pdf/Bosch_water-wizard.pdf
http://waterheatertimer.org/pdf/Bosch_13P_16P_In.pdf

Following links talk about keeping pilot lit, and describe location somewhat. Bosch water wizard has standing pilot light.
http://www.fixya.com/support/t2961646-water_wizard_10p_pilot_light_keeps_going
http://www.fixya.com/support/t2960079-bosh_water_wizard_10p_pilot_light_keeps
http://www.fixya.com/support/t6182021-bosch_10p_tankless_hot_water

1) The manual does not show diagrams you asked for.

2) Website that sells Bosch parts does not show parts for water wizard, nor does Bosch site for parts: Instruction manual says: replace pilot injector
http://www.boschhotwater.com/HelpfulResources/PurchaseParts/tabid/837/Default.aspx
http://www.houseneeds.com/shop/heatingproducts/waterheating/parts/bosch2400espartsbuy.asp#

3) Searching "pilot injector for Bosch Water wizard" turns up fixya questions which is generally bad news for do-it-yourselfer because it means information sources are through service technician.

4) As a general rule, tankless are not do-it-yourself repairs or installation because they are affected by so many internal and external factors, including air quality, air flow, venting, other gas appliances, gas pressure, gas supply, water pressure, water flow, plumbing problems, water quality, plus internal parts and including any combination of things listed above..
Replacement parts each come will disclaimer.

Add a comment with your experience so others with same-similar problem can benefit.
Send some photos so the internet can see the problem.
http://www.fixya.com/support/r6568559-post_photograph_fixya_questions_answers

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.

http://www.ps2netdrivers.net/parts/bosch.gwh.425.hn/

Stupid me but could you be a little bit literate in asking a question.My dog write better questions that I can understand than this scribbling.A GWH 2400 is the little brother of the GWH 2700 much like the 635ES. If you have an LP model be sure to use the overpressure protection valve supplied by Bosch as overpressure in LP (above 10-14" WC) can completely destroy this unit.And you can use a TPR or PRV for 170,000+BTU being sure you get a House Pressure valve of 60-80-100 PSI+ and not the boiler PRV for 30 PSIBeyond that your questions above states nothing recognizable as a technical question

first time heard of a tankless that is round