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

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Powerstar ae-125 takes forever to warm up and gets cold during shower

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 82 Answers

SOURCE: Bosch AquaStar 125b ng suddenly goes cold during shower

Does it happen to any other fixture? If not, it's most likely your shower valve and not heater.

Posted on Sep 04, 2009

miket756
  • 2702 Answers

SOURCE: Cold water suddenly shuts off during shower.

sounds like you may have "air" in the pipes and that bang has slamed the water reg valve shut hard

Posted on Mar 28, 2010

  • 33 Answers

SOURCE: We have a powerstar 125

try bleeding that section of pipe. or the whole system if not.

Posted on Jan 30, 2011

  • 5089 Answers

SOURCE: On demand hot water heater gets cold for a short while during showers.

Check for crossover.
Bad single-handle faucet cartridge causes cold water to enter hot pipe, so hot never arrives and tankless does not run consistAntly
http://waterheatertimer.org/Crossover.html

Posted on Apr 13, 2013

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Powerstar model 45557701


Copy following link:
http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html
AE115 has two elements and requires two 40 amp breakers.
A#125 has three elements and requires three 40 amp breakers, and is considered 'whole-house'
Do not install a tankless water heater because they cost more to install, and cost more to operate and maintain..
Add a comment and ask question.

Jun 21, 2013 | Water Heaters

1 Answer

AE-9.5 Bosch Tankless Water heater - no manuel or installation instructions


This is a "point of service" tankless water heater that was manufactured by BOSCH. BOSCH is now Bosch-Climate.us. Technical support is available at 866-330-2729. P.S. check this site: http://tanklesswaterheaterz.com/bosch-ae-9-5-powerstar-1-5-gpm-point-of-use-indoor-tankless-electric-water-heater-reviews/

Feb 02, 2013 | Bosch AE-9.5 Electric PowerStar PowerStar...

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

Bosch AE-9.5 keeps tripping the reset


All resets and breakers trip with high heat.
Do you mean the tankless unit is tripping the 40 amp circuit breaker?
Or the thermal cut-out, located on unit, is tripping?

Is this a new installation?
Or was the tankless working before and stop working?

Copy following link to check wiring.
AE 9.5 requires 40 amp breaker and 6 gauge wire.
http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html

If the unit is tripping the thermal cut, -out, then product manual says to call Bosch or service technician.
Call Bosch 866-330-2729
http://waterheatertimer.org/pdf/Bosch-Powerstar-AE3.4-7.2-9.5.pdf
Thermal cut-out can trip if water flow is too low.
Try changing power selector screw from Hi to Lo so only 1 element is ON. See diagram page 6 of manual.
Adjust the 'outlet service valve:' The manual recommends that a ball valve be installed between hot outlet and faucet. Adjust the valve so more water flows to faucet.
Remove aerator, clean aerator, don't use low flow restrictions or low flow shower heads, replace leaky faucet cartridge on single-handle faucet.

Aug 29, 2012 | Bosch AE-9.5 PowerStar 1.5 GPM...

1 Answer

Have the 125. The light comes on on the panel, but water is usually ice cold. Have tried adjusting the thermostat but same results. Open to any suggestions on this matter. Thanks


Any suggestion could include a list of possible problems from bad PC board, burned out element, bad sensor, loose wire, or combination or these.
More information is needed to make a guess.
Test elements for continuity.
Check wires for loose and burned connections.
Open TP valve and test if hot water is available at machine.
If water at TP valve is hot, then problem might be plumbing-related, for example crossover.
http://waterheatertimer.org/Crossover.html

Aug 15, 2011 | PowerStar AE 125 Electric Tankless Water...

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...

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...

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