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Need manual for bosch gwh 2700 ctdr efs - Bosch AquaStar 2400ES-NG

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: I have a Bosch GWH

A lot of factors, internal and external, can cause this problem ranging from bad PC board to plumbing problem.

Since you have no error code, it could be plumbing,
http://waterheatertimer.org/pdf/No-Error-Code.pdf

Open following link for useful Bosch troubleshooting information including Bosch support and typical manual for 2700 gas tankless:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

For folks with Rheem tankless:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

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.

Posted on Mar 26, 2011

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1 Answer

I have a Bosch gas tankless water heater, model GWH 425 EF. The igniter does not stop sparking once the flame is lit. What will cause this?


Your electronic ignition unit is not rectifying through the gas flame, it is a sensitive piece of equipment and has failed.

Jun 08, 2015 | Bosch Water Heaters

1 Answer

How do i gas heater gwh 2400 ctd efs Lp


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 PSI

Beyond that your questions above states nothing recognizable as a technical question

Oct 19, 2014 | Bosch & Tankless LP Hot Water Heater

1 Answer

I have a Bosch Tankless Water HEater Model GWH 2700 ES NG with an error code of A3. I was told to push reset and the problem would be resolved. This worked several times and now it doesn't work. ...


Yes. Contact Bosch.
Error codes are considered start-point for troubleshoot.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Tankless are complex electronic machines.
If on-site plumbers cannot figure out problem, then you need trained service technician with a service manual for your specific product, who can ohm-test the electronics.
Bosch will have a list of trained service technicians. And maybe Bosch has another step for fixing problem yourself.

Fix most tankless problems yourself, same day, for $330.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Aug 14, 2011 | Bosch AquaStar 2400ES-NG

1 Answer

Where can i download a GWH 715 ES manual?


Are you looking for sell sheet pdf, or install-care manual, or service manual.
Search: GWH 715 ES manual .pdf
Adding .pdf to search parameter helps locate manuals.

Sell sheet with venting overview, technical and product specs:
http://www.globaltowne.com/manuals/sell_sheets/715-800SellSheetFINAL.pdf

Manual for ES high altitude, with installation, error codes and troubleshoot:
http://www.bosch-climate.us/files/201009031238250.GWH715ES_English_12.2008.pdf

I cannot find a service manual, or service bulletins:
http://www.bosch-climate.us/support-center/downloads/bosch-manuals/earlier-models.html

Aug 11, 2011 | Bosch ProTankless GWH 715 ES LP Tankless...

1 Answer

Water temp flucuates from hot to cold, esspedially on very rainy days.


Gas water heater problem based on weather could imply atmospheric interference, which might indicate venting problem. Check vent specs for that model. Make sure roof or side wall vent are installed correctly, and lenghts do not exceed maximum.
Problem might also be associated with elevation setting, since water heaters are sold to match expected conditions at that elevation.
If rain is associated with cooler temperatures, and more gas appliances run at same time, then unit might be starved for gas or home does not have enough ventilation.
Problem could also indicate that tankless unit needs to catch up on yearly maintenance, including clean burner and combustion parts, check loose wiring, test ignition system, clean air intake, bleed gas line, check gas pressure and check for correct vent, etc.
Before calling service technician, open following link for Bosch troubleshooting resources including Bosch contact, typical manuals, etc.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Aug 09, 2011 | Bosch GWH 425 EF L Water Heater

1 Answer

My Bosch GWH 425 EF will not ignite. Have had this water heater 3 years - it is happening more & more, plumber that installed it says it supposed to do this....pretty sure it's not.


im leaning towards the thermo coupler its like a eye only it measures the heat at the pilot tight if it tells the unit its off it shuts down and turnes the gas off thats why you have to keep relighting hope this helps.

Apr 26, 2011 | Bosch GWH 425 EF L Water Heater

1 Answer

I have a Bosch GWH 2700 CTDR EFS NG and the water will not get hot and if it does, it's only for a brief moment.


A lot of factors, internal and external, can cause this problem ranging from bad PC board to plumbing problem.

Since you have no error code, it could be plumbing,
http://waterheatertimer.org/pdf/No-Error-Code.pdf

Open following link for useful Bosch troubleshooting information including Bosch support and typical manual for 2700 gas tankless:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

For folks with Rheem tankless:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

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.

Mar 26, 2011 | Bosch AquaStar 2400ES-NG

1 Answer

My gwh 2700 keeps freezing at night,and takes about 2 to 3 mins to reach a warm temp. had it for a 2 years no problem. just started with freezing. how do i fix it.


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

Mar 06, 2011 | Bosch AquaStar 2400ES-NG

1 Answer

Wont stay fired up


Bosch tech support will ask you to turn off the valve to the water heater and open a hot water tap. If you have water flowing it is likely from a shower valve. My experience is Price Pfister shower valves are usually the culprit. Let me know how this turns out.

Apr 09, 2010 | Bosch GWH 425 EF N Water Heater

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