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!!!
Thank you LauraBetteri - this is a perfect fix to a problem that was going to cost me a $150 service call. Bravo and many thanks.
thank you so much!! our system did the exact same thing flashing 10 but working still but then flashed 99 and wouldnt work this actually fixed it and it is working fine amazing
Thank you so much my controller was flashing 10 for a while then started flashing 99 and the hot water stopped this has fixed it your a life and money saver
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I am a free answerer, and I specialize in giving you resources for free
The paid answerers may have a person who knows your product and the problems associated with your model.
I believe they offer a refund if the 'fix' doesn't work.
The manual might also have troubleshooting.
Each day I see 20-25 unanswered questions about tankless water heaters.
And the day before, there were same number of unanswered questions about tankless products.
The number of questions shows the complexity of the machines, the brand-specific-ness of the problems, and the inability of the manufactures to take care of their customers.
If I understand correctly, the manufacturer will refer you to the installer.
There are not many ways a do-it-yourself-er can fix a tankless.
And a repair generally takes somebody trained by the manufacturer.
http://www.thetankatwaterheaterrescue.com/forums/forum3/
Open following link for Bosch resources:http://waterheatertimer.org/Troubleshoot...
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