Question about Bosch PowerStar AE3.4 AE3.4 Point-of-Use Electric Tankless Water Heater...

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Powerstar bosch tankless water heater ae3.4

When the breaker is turned on the copper gets hot automatically and the water pipe line gets to out and swells up the pipe line.
The water is not even turned on yet.
Can you tell me if the device is faulty.

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Yes the device is faulty. the unit should not heat water unless a tap is turned on. Call in a service rep to assess the problem. Do it quickly your description doesn't sound good.

Please rate this response and Good Luck Phil

Posted on Jan 02, 2009

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Posted on Jan 02, 2017

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Symptom: water gets too hot, before and after thermostats are replaced, burn mark and insulation swelling/melting on non-common wire from upper element to upper thermostat, and the breaker trips.


Double check the thermostat connection and setting; if it persists, I would add a pipe hugging thermostat connected to a shunt trip for the heater elements.

Jul 26, 2015 | Water Heaters

1 Answer

I have a Bosch Powerstar Ae115 and the left cutout keeps tripping. It has worked great for 5 years. When i reset it, the water gets warm again(never hot as it was before). What could be causing it to trip?


Water leaking into elements. Bad PC board. Undersized breakers. Undersized main panel.
Bosch Powerstar is a computer that happens to heat water.
If your 5-year-old laptop computer was malfunctioning, you would not be surprised.
But for some reason (false marketing by manufacturers?), folks believe a tankless computer is going to last 20 years.
Moreover folks also believe tankless will provide endless hot water while saving money.
The whole idea of tankless saving money is a load of sales-BS that defies physics and common sense.
There are no service manuals... except bosch website has troubleshoot section in product manual.
Call a bosch-qualified service tech.
Go to Lowes and buy ordinary tank heater, and fix your heater today for only $250.
Tank-type electric water heater can be easily repaired and maintained by homeowner to last forever... that is a fact
http://waterheatertimer.org/How-to-maintain-water-heater.html

http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html

Gene

Jan 12, 2014 | Water Heaters

1 Answer

AE 125 Just Stopped Working Altogether,,,Still Has Power But No Light Or Hot Water?


Turn circuit breakers fully off and then back on.
Use nose to smell for burning inside main panel.
Make sure you are getting 240Volt and not just 120V from one leg of the breaker.
Do stress test on breaker panel.
http://waterheatertimer.org/Troubleshoot-household-electricity.html#stress

Least expensive solution: Replace tankless computer for $285 buying tank-type electric water heater from local box store.

If tankless computer is new, then call installer.
If you installed it yourself, call professional installer.
http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html

Gene
h

Sep 24, 2013 | Bosch PowerStar AE125 AE125 Whole House...

1 Answer

There is power to the system but when you turn water on elements do not come one and heat water. all phases have 238 volts to them. why will system not turn on and heat water


Do you have 3-phase water heater? Is this balanced or unbalanced 3-phase unit. Add comment and describe product in detail, including brand since i have some service resources for both types.
Or do you have ordinary residential split-phase 240Volt Bosch tankless computer that heats water, and has 2 or 3 separate elements, and a separate circuit breaker supplying power to each element? And testing across both hot leads coming from each breaker yields 238Volt?
Copy following link for Bosch tankless manuals, with brief troubleshoot section that does not provide detailed service procedures for repairing tankless computer:
http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html#manual
If this is new water heater, then call installer. If you installed yourself, then remove tankless and return to seller for refund.
Tankless computers require certain amount of water flow to activate computer sensors. Turn on Hot tap and listen to pipe to hear if water if flowing through hot pipe. Check for crossover:
http://waterheatertimer.org/Crossover.html
Clean water filter usually located just above where cold water connects to unit.
Delime tankless ... and use water softener. Tankless cannot be exposed to more than 11 grains hardness in water, or parts will fail within 2-3 years. Simply deliming tankless heat exchanger each year will not maintain full efficiency... although for typical family of 4, tankless comper water heater costs $100 more to operate than tank-type heater according to manufacturer's promo literature and independent studies.
Call local technician who specializes in fixing tankless computers. For plumbing problems call local plumber. These are two different things.
If tankless computer is older, then cut losses, and buy tank-type electric water heater at Lowes for $285 and make quick changeover and have hot water same day. Sell old tankless on ebay and cheat next guy, or sell at scrapyard for $3 per 100.
Gene
h

Aug 05, 2013 | Bosch PowerStar AE125 AE125 Whole House...

1 Answer

I have a PowerStar tankless electric water heater, model #44-557710 and it was replaced about 3 months ago. This morning I had hot water and this afternoon I do not. When I call for hot water a red light...


Call Bosch. And exercise your 10 year parts warranty rights.
Copy following link for Bosch power star manuals:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html#Ariston
Check circuit breakers, fully off and then fully back on. Test if voltage is at least 80% rating plate on unit. Check that temperature dial is set correctly. Call for service again.
Don't install tankless computer that heats water. You cannot fix this computer yourself, and they are problematic for owners.
Go to Lowes right now, spend $285 and buy tank-type electric water heater, roll it into your house, and save money, since the electric tankless computer heater costs average $100 more per year to operate than tank-type heater for average family of 4.
Tank type heater can be repaired by homeowner same day for $25 using off-the-shelf parts from hardware store. And that empowers the regular guy, and gets you off the junk tankless treadmill.
Gene

Aug 03, 2013 | Powerstar Water Heaters

1 Answer

When I run hot water for the tub, it has a brown tint


10 year old homes today usually do not have galvanized pipe. They have copper or pex plastic pipe. These do not rust.
Is rusty water on both hot and cold line, or just hot line?
Just hot line, then check anode rod and flush tank:
http://waterheatertimer.org/Replace-anode-rod.html
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html#flush
Are you on water well? Well casing can get rusted. Water can have minerals. Call local water well service and describe problem in detail.
Are you on city water or mudd district water? Is pipe coming into house made of galvanized? Look inside meter box or look at pipe coming into house. Sometimes the city water line at end of run can get filled with sediments that will discolor water. Have water company flush the city water line.

May 04, 2013 | Rheem 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

Powerstar 115 tankless tripping reset ontop of #2 heat chamber #1 does not get overly warm mainly because of incoming water temp. but #2 seems to be heating after water flow stops to hot to touch and...


I don't have specific suggestion for tankless tripping breaker or if that is a circuit breaker problem or a tankless problem.

1) Move wires to another same-size breaker and see if problem persists.

2) Compare amp draw on tankless label with wire size and breaker size amp rating.
For example 30 amp breaker using 10ga wire is rated for 80% of listed amps or 24 amps.

3) If you are drawing full 30 amps, then 30 amp breaker is getting hot. Breaker trips with heat. Older breakers can trip more easily.
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

4) Before calling service technician, open following link for Bosch troubleshooting steps.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

5) Be sure to read manual for yearly maintenance requirements.

6) Add a tempering tank for incoming cold water problem.
http://waterheatertimer.org/Tempering-tank.html

7) All gas tankless brands can be repaired by homeowner for $330.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Apr 22, 2011 | Bosch PowerStar AE115 Tankless Water...

1 Answer

Recently purchassed system from you plumber installed it and we asked specifically not to set it on child settings.....we have not had one HOT shower since. how do we go about resetting the hot water...


These Tankless water heaters attempt to heat water as it quickly travels through a short series of heated copper pipes. A high volume of water at an accelerated speed has little time to heat up as it passes through its heating source. You can turn up the temperature (which you undoubtably tried) and turn the water volume all the way down. These settings will produce the hottest temperature capable of the unit - given the entry temperature of your water source.
Most underground water enters at app 52 degrees - and becomes even colder due to ambient temperatures. Difficult to raise this temperature 60-70 degrees in a few seconds of heating.
I've routed a series of copper pipes adjesent to the home heating system in an attempt to pre-heat incomming water. It's only a few degrees warmer, but results a 20- 30 degree hotter delivery.
I have installed some top end units that simply delivers Hot water without compermise.

Mar 01, 2011 | Bosch & Tankless LP Hot Water Heater

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