Question about Bosch AquaStar Indoor Natural Gas Tankless Water Heater with Vent Hood #125

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 forward into the hot water lines. I am thinking that because of the excessive heat, the CPVC pipes attached to the unit are swelling and about to burst, which by the way has already happened twice... if unit does shut down before tha pipes burst, both the flame and the pilot light go out... any suggestions on what the problem may be?

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1 Answer

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.

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Posted on Apr 02, 2011

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