Question about Bosch AquaStar 2400ES-NG

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How can I get Bosch to honor a warranty for me. I am need a control unit (Part Number 8707207296) of my water heater. I bought it at Lowe's but they told me to call Bosch, but they said the trouble shooting has to be done by an authorized Tech. I research the problem , went with the technical service bulletin and discover the issue by Bosch still says a Tech is necessary to do the work. Thanks.

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Yes Bosch is very annimate on having a service plumber check out the problem with their heater. If a qualified technician is not the one to diagnose the problem correctly they could be wasting money sending out the parts when they are not the right ones. Very understandable on their part.

Posted on Sep 16, 2010


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Failed Bosch AE125

Contact Bosch 800-283-3787, or service technician.

Product has 10 year limited warranty against defects in workmanship, failed parts, failed heat exchanger for original homeowner with receipt. But does not cover neglect, failure to follow maintenance, installation etc. Pg 23 example manual
You generally have to pay for service call to verify installation, then send tankless into factory, or have service technician repair unit, at your expense minus cost of parts

To double check wiring:

Sep 29, 2012 | Bosch PowerStar AE125 AE125 Whole House...

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Error codes E1 and most recently EC. We have been geting fluctuating hot and cold and now only cold water. I have replaced the OTS, cleaned the inlet filter screen, descaled the tank, with no success. ...

You had service techs and Bosch techs and neither can find a solution.
I assume you want impartial opinion at fixya.
Multiple error codes and a lack of progress by professionals implies PC board failure. BUT there could be multiple problems. Error codes are considered 'start' point for troubleshooting. Beyond that, Bosch should give you contact information to a trained professional service tech >> not just a plumber, but a guy who can do the electronic diagnostic.
Open following link for Bosch troubleshooting resources.
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I have a Power Star electric hot water heater, model AE 125, serial # 39-203967, model 45-55130. purchased 5 years ago at Home Depot for $850.00. I love the heater when it works. This is the second time I...

Bosch has 10-year limited warranty.
Probably the seller honors warranty first 90 days and Bosch afterward.

I think warranty is similar to car warranty where parts are covered, and they pay for parts to patch up the blown transmission but not give you a new car. But I hear of cases where the company just send a whole new Tankless unit and you install it yourself.

Contact Home Depot and present them with receipt.
Contact Bosch with the same information given in Fixya question.

Add a comment and say why unit broke down first time, and add what resolution was reached to help others with same question.

Upvote the help.
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I have model no. 45-550301 and it produces hot water for a moment or so then pops the reset off..............

Sounds like you may actually need to have the unit recalibrated by a Bosch Authorized Technician. Bosch Tankless units MUST be cinstalled and calibrated by a factory trained and certified technician as they are the only ones who have the proper tools for setting up the units.
If you did not have it installed by someone who is certified by Bosch, I would recommend that you call Bosch Service and get the name of someone who is.
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The heater should be plugged into an isolated 15amp minimum outlet.

Check the breaker/outlet, then call Bosch service next. The units have a 12 year warranty, so get it checked out. You may have to pay for the labor, but if they are certified and have the calibration unit, it should run you no more than a 1 hour call.

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We have a Power Star Bosch water heater it find for two years but now it take longer to get the warm water and it turn back to cold very fast. Model #45-557701

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AE115 is 2 years old and stopped heating the water. The red light is very, very dim which tells me it's a power problem. I've had no problems at all until now. I replaced the two 40 fuses and that did not...

Here are some possibilities and checks.
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