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My Aquastar 240FX is not working and the technician cannot find the part needed. This tankless water heater is the same as the Takagi TK1. Part needed is the flame sensor EK17. Any leads on finding the part?

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6ya6ya
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Posted on Jan 02, 2017

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mrhotandcold
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SOURCE: bought a TK-RE02 for my aquastar 240fx (takagi

the basic installation will be the same only the setting will be different boiler wil be factory set shouldn,t be a problem best of luck

Posted on Nov 10, 2009

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Will not fire at all, trys to light but get the e1 code . used to work intermitently or fire right of way but then go cold and back to hot for about five min. then stay hot now wont even light


Before calling service technician, open following links for troubleshoot resources:
http://waterheatertimer.org/pdf/Bosch_E1_troubleshooting.pdf
http://www.bosch-climate.us/bosch-hot-water/aquastar-service-bulletins/
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
http://waterheatertimer.org/Crossover.html

Before installing tankless water heater, read the service manuals and product manual to make sure you have testing skills and equipment needed to repair tankless gas water heater, and that you are prepared to buy expensive parts when needed and do the recommended yearly and monthly maintenance as outlined in manual.
Also check that area has qualified service technician, and that person carries parts on-hand, and is certified for your model number. Keep Tankless manufacturer contact information on-hand, and be skeptical of promises of unlimited hot water, and effortless long-lasting water heating, and saving money. The only folks saying this are the folks selling the product, and not their customers.

Fix most tankless gas water heaters yourself, same day, all brads for about $350.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Sep 21, 2011 | Bosch Water Heaters AquaStar 250SXO...

1 Answer

Aquastar125WP is overheating and the strainer has been removed. We need to fix it. Have any ideas? Thanks for your support, Martina


Before calling service technician, open following links for troubleshoot resources:
The problem could be bad gas control solenoid, or bad sensor, or bad wiring or bad PC-board, etc, or combination of problems. Fixing one problem may not completely fix problem.
http://www.bosch-climate.us/bosch-hot-water/aquastar-service-bulletins/
http://www.bosch-climate.us/bosch-hot-water/aquastar-service-bulletins/38b-125-series-bulletins.html
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Before installing tankless water heater, read the service manuals and product manual to make sure you have testing skills and equipment needed to repair tankless gas water heater, and that you are prepared to buy expensive parts and do the recommended yearly and monthly maintenance.
Also check that area has qualified service technician, and that person carries parts on-hand, and is certified to service your model number. Keep Tankless manufacturer contact information on-hand, and be skeptical of promises of unlimited hot water, and effortless long-lasting water heating, and saving money. The only folks saying this are the folks selling the product, and not their customers.

Fix most tankless gas water heaters yourself, same day, all brads for about $350.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Sep 21, 2011 | Water Heaters

1 Answer

No Spark at the boiler end ,tried purging the system but still no luck water pressure is fine.???????


Before calling service technician, open following link for Bosch tankless troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Fix most tankless problems do-it-yourself, same day any brand, for $317
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Add a comment for more free help.
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.

Apr 28, 2011 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

Failing ignition on Bosch Aquastar AQ125-HX tankless on demand water heater. Carefully followed all directions on device to best of ability. Gas supply is full and on. Water pressure should be...


Before calling service technician, open following links for Bosch troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
Resources at Bosch
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/tabid/370/Default.aspx
Typical Bosch Aquastar manual:
http://waterheatertimer.org/pdf/Bosch-aquastar-170vp-manual.pdf

All tankless and tank-type gas water heaters require regular cleaning and maintenance.
It is unknown if your unit needs maintenance or repair parts, but catching up on maintenance using information from manual is good place to start.
Gas appliances are increasingly complicated and experienced technician is good resource to have in local area before installing tankless.

Apr 16, 2011 | Bosch AquaStar Indoor Natural Gas Tankless...

1 Answer

Pilot light works but no flame. Somehow, think it overheated due to stoppage of water flow at sink.


Before calling service technician, open following links for Bosch troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
Resources at Bosch
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/tabid/370/Default.aspx
Typical Bosch Aquastar manual:
http://waterheatertimer.org/pdf/Bosch-aquastar-170vp-manual.pdf

All tankless and tank-type gas water heaters require regular cleaning and maintenance.
It is unknown if your unit needs maintenance or repair parts, but catching up on maintenance using information from manual is good place to start.
Gas appliances are increasingly complicated and experienced technician is good resource to have in local area before installing tankless.

Apr 16, 2011 | Bosch AQ125BO LP AquaStar 4.3 GPM Outdoor...

1 Answer

I have a Bosch AquaStar AQ-125-BNG tankless water heater, and for some reason when it is heating the water, it seems to get exremely hot and the heat is radiated back into the cold water supply line and...


Tankless should never be installed with plastic pipe, PVC or CPVC etc.

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.

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1 Answer

Fan won't stop running


remove from the wall.... donate to charity and purchase a quality tankless water heater!!!

Rinnai, Takagi, Noritz are the only brands I will install. I refuse to even work on Bosch "Aquastar", complete garbage!

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Takagi Jr Flash Water Heater Problem


explain your problem.
Takagi is a great tankless heater, very few problems...

need more info

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Difficult to turn the water heater


step one... remove from wall
step two... throw in dumpster
step three... purchase and install a quality tankless water heater.

Rinnai, takagi, Noritz are the only brands I install now. Aquastar (Bosch) always had problems, then purchased by Bosch but never fixed the problems, just put their name on it and sold them at Lowes or home depot.
Garbage!

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