Question about Bosch PowerStar AE125 AE125 Whole House Electric Tankless Water Heater...

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Bosch ae125-re tankless water heaters

Do you consider these units to be reliable and suitable for a 1 bed flat. Purely for sink and shower use, with no other means of heating water

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  • lrmr6561 Jan 19, 2009

    AE125 tankless water heater has almost no water pressure. Have to turn the incoming water almost off for the water to get hot, thus leaving no hot water pressure. Is this normal??

  • George Sararu Feb 02, 2013

    You can get as much hot water as the amount of gas you can burn! 99% of the time the luck of water volume is because of luck of gas volume for various reasons. the plumber simply try to compensate by reducing the water flow . that in exchange create a bad brand image .

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  • Bosch Master
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My experience in Germany with tankless water heaters was not good; the delivery promised was only vaguely warmed water; they are no replacement for standard devices.
If you can find closet or under-counter (in the kitchen) space you might look into the 20 gallon units made for RVs or small mobile homes/campers. They are not expensive to run and cost well below the ~ $400 US price I saw when looking at the Bosch. If you are worried about the efficiency of them or concerned with the cost of electricity in your area, you could have an electrician install a high-capacity (15-20 Amp) toggle switch (looks like a normal light switch) and manually turn it off completely when it is unused for a longer period of time.
In any case, before you jump on the Bosch bandwagon, check the degree (or lack) of satisfaction from current owners:
http://www.amazon.com/review/product/B0006GVO0S/ref=dp_top_cm_cr_acr_txt?_encoding=UTF8&showViewpoints=1
I wouldn't be encouraged to buy that one.   

Posted on Sep 18, 2008

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Leaking tank


Replace heater?
Do not install tankless.
Call for service?
Manual does not show troubleshoot or repairs
Bosch site does not show the AE125 series water heater any longer
http://waterheatertimer.org/pdf/Bosch-AE115-AE125_manual.pdf

Gene

Oct 19, 2014 | Bosch PowerStar AE125 AE125 Whole House...

1 Answer

How many wires does it take to wire a bosch ae125 tankless water heater


You need three #8 wires for AE125. Two #8 wires for AE115.

1) Copy following link for wiring information:http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html

2) The AE125 has 3 elements, and requires 3 wires.Each wire is sized #8 copper, and is connected to 40 amp breaker, up to 100 feet. Over 100 feet, use 50 amp breaker and #6 wire. Oversizing breaker and wire is smarted and more efficient than undersizing.

3) Often a separate subpanel is installed to provide 3 extra spaces.

http://waterheatertimer.org/images/Main-subpanel-Tankless-600.jpg


4) Makes sure main breaker panel can accept additional 120 amps of draw without overampping panel ... and starving other appliances of full power.... that will damage appliances, overheat motors, and damage main panel and overheat main breaker. You want to oversize, not undersize electric service when installing tankless electric, which is why I do not recommend tankless electric installation, including issues of costing more to operate, and expensive repairs, and general money risk-nuisance of owning tankless vrs tank-type heater.
http://waterheatertimer.org/Troubleshoot-household-electricity.html#stress

Dec 06, 2012 | Bosch PowerStar AE125 AE125 Whole House...

1 Answer

Failed Bosch AE125


Contact Bosch 800-283-3787, or service technician.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

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
http://waterheatertimer.org/pdf/Bosch-AE115-AE125_manual.pdf

To double check wiring:
http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html

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

1 Answer

The thermal cutout pops on tank two after it shuts off. It boils then shuts off. It also turns off when taking a shower, producing cold water. I checked the ohm readings on the thermal cutout and the...


Question posted under Bosch tankless.
Question says 'tank'
Brand, model, and type heater unknown.
Elements mean electric.
'Thermal cutout pops when taking shower produces cold water' indicates tankless, since tank-type would maintain some hot water.
No error code might indicate tank-type.
Add a comment with type, brand and model number of heater for possible assistance.

Sep 24, 2012 | Bosch PowerStar AE125 AE125 Whole House...

1 Answer

When i am taking a bath or a shower somtimes it kicks my breaker what would cause this and how do i fix it


Does the panel box have the proper size breaker for this unit.Iwould start with checking that before any thing else. hope this works

Jan 23, 2011 | Bosch PowerStar AE125 AE125 Whole House...

1 Answer

My Powerstar tankless water heater was installed last April and we have a problem that has become a real issue. We can set the temperature where we want it and get in the shower and the water will go from...


Ok, sounds like a flow sensor issue, is your house water pressure steady or does it fluctuate? The sensors on these seem to be a common issue and this model has many issues with heating. take care

Jan 17, 2011 | Bosch PowerStar AE125 AE125 Whole House...

2 Answers

Our second unit just failed and needs a new controller more money


The only Bosch tankless I have ever touched have been the 3 I have taken out and replaced with Rinnai. I think Bosch/Paloma/etc. have two problems:

1. They do not properly certify technicians before allowing them to install these units.

2. Their product is mediocre at best.

The biggest problem I've seen is that people don't vent them properly. The last one I pulled out had a combined vent length of 55'. 55 FEET! Absurd!
The units was condensing so much inside the vent that it washed out 2 gas control valves in ONE YEAR.

Buy Rinnai, buy Takagi, buy Noritz....maybe even a Navien (new player...time will tell)
+
Factory certified technicians, preferably equipped to do the gas & plumbing without having to sub it out.
=
Years of trouble-free hot water.

Good Luck.

Jun 30, 2009 | Bosch PowerStar AE125 AE125 Whole House...

1 Answer

Need tanks for bosch ae-125 water heater


good luck,, there aren't that many whole house electric tankless units of any kind even made

Apr 17, 2009 | Bosch PowerStar AE125 AE125 Whole House...

2 Answers

PowerStar AE125 seems to have failed


You have a blown element. If you purchased the heater, call Bosch for technical assistance, and the unit should be under warranty. The grey matter your getting is the magnesium that the elements have in them.

Nov 12, 2008 | Bosch PowerStar AE125 AE125 Whole House...

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