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Power Star Model 45-551301 Tankless water heater (electric) At random times and under normal usage conditions (only one fixture running at one time) the water heater will stop working and the water will go cold. I'm fairly sure it's not a burned out heating element because when it works, it works fine. Any thoughts?

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Posted on Jan 02, 2017

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SOURCE: Paloma PTG 74PV N1 Tankless Water Heater - stops heating

Most likely problem is the remote control not the main board. A safe temporary fix is to unplug the heater from the 110 volt outlet, remove the two low voltage wires from the remote control and use a small wire nut to connect the two conductors together. Plug the heater back into the 110 outlet and the heater should work just fine. The default water temperature is about 118 degrees at the heater. Replace the remote control ASAP.

Posted on Aug 03, 2009

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SOURCE: Titan Tankless stopped working this morning.

I have the Titan SCR2 N-120. You may have a different model. On mine if you are looking at it just a inch below & 1 inch to the left of dead center will be a round black sticker(it has some white lines at&t's logo). there's a pin hole in the middle of the sticker that you can poke to reset. Or turn the breaker off then take the 2 screws out of the top of the unit. It's just a thin metal cover that you can pull back & look inside. You'll see a red circular button thats the reset button. It's right behind where the hole I was talking about & what gets pushed in. you'll also be able to see if anything burned out & can get replacement parts at titanheater.com . One of my heater elements had burn/ melted & I've ordered a replacement. It was $17 + $11 s&h but still cheaper than $200 new unit from e b a y. Best of Luck

Posted on Sep 05, 2009

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SOURCE: I have a paloma tankless water heater about 3

I had the same problem with my Paloma a year and a half after installation...contacted Rheem customer service (800-432-8373) and they recommened a local installer in my area. The technican diagnosed the problem as the "flow control valve"; he managed to get Rheem/Paloma to cover the part under warranty...I only had to shell out the money for the install.

Posted on Nov 06, 2009

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SOURCE: why am i getting a A3 error code on my bosch aqua

Question is though, why would this fail after only six months?

Posted on Dec 08, 2009

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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

Our tankless water heat will not heat the water-it won't ignite


Question posted under Boasch tankless. Model number not known.
Before calling service technician, open following link for Bosch troubleshooting resources, including phone and contact for Bosch, error codes, and possible manual, plus hours of reading and research:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

As you know from reading manual, tankless water heaters require yearly maintenance by trained service technician, or by homeowner. This action would check gas and pressure, venting draft, condensation drain, burner and combustion parts, igniter and-or pilot light, electrical connections, air intake and general condition of plumbing.
Problem you describe does not include error code.
Open following link for possible help with general plumbing problem:
http://waterheatertimer.org/pdf/No-Error-Code.pdf

Add a comment with model number that appears on side of unit, and I can directly locate possible service bulletins and further troubleshoot resources available at Bosch for possible do-it-yourself diagnosis and repair.

Sep 02, 2011 | Bosch & Tankless LP Hot Water Heater

1 Answer

I would like to know the electrical requirements.( voltage and amperage) Does it plug in or is it hard wired? If the power goes out is the hot water also out? thankyou


Are you asking about tankless gas or tankless electric?

You posted under Tankless gas water heater: gas type tankless plugs into standard 120Volt household outlet to power circuit board. You need larger gas line than used for tank-type gas water heater.

If you are asking about volt and amp draw of Tankless electric, then that depends on specific model number.
For example, if each tankless element draws 3500Watts, and unit has 3 elements, you will need 3 additional 20 amp 240Volt circuit breakers. Volts x amps = watts. 3500 watts divided by 240Volts = 14.58 amps. At full blast, this unit would draw 43.75 amps and will cost more to operate yearly than tank-type electric water heater. If unit has 4500 watts elements, then it will draw 56 amps at full blast, and use a good percentage of household power.

Tankless water heaters have no hot water in power outage. This is true for gas and electric models.

Additional resources:
http://waterheatertimer.org/images/Compare-water-heater-parts-650.jpg
http://waterheatertimer.org/pro-n-con.html
http://waterheatertimer.org/pdf/Bradford-White-on-demand-tankless-service-manual.pdf

Aug 04, 2011 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

The eco 180 dv tankless water heater will not turn on unless you run the tub/shower and lavatory at the same time. Running only one fixture at the same time will not kick on the water heater.


You have tankless water heater, and no error code.
Burner does not activate with one faucet, but activates with 3 faucets.
Best suspect is crossover:
http://waterheatertimer.org/Crossover.html
http://waterheatertimer.org/pdf/No-Error-Code.pdf
Problem can be a combination of causes including Tankless part failure: sensors are not working, PC board is bad, wires are loose. Call service technician to catch up on yearly maintenance and troubleshoot problem. Tankless water heaters require yearly maintenance.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Jul 21, 2011 | Rheem EcoSense by 7.4 GPM Tankless Water...

1 Answer

Where do I find model number or serial number?I turned off main water valve to replace a leaking pipe and now I can't turn on the water heater. How do I do it?


1) You posted under Bosch tankless water heater.
There should be a nameplate on front of unit or located where you can see it.
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/2400ESTechSupport/Troubleshooting/tabid/1295/Default.aspx

Bosch problems at Fixya:
http://www.fixya.com/support/p949576-bosch_1600h_lp_liquid_propane_aquastar_a/solutions

Bosch has online tech support form:
http://forms.boschhotwater.com/Home/BoschTechSupportForm/tabid/614/Default.aspx

2) Replacing water valve probably loosened build-up inside pipe that lodged in water heater or inside elbow just beneath tankless unit.
If water flow is stopped or slowed, tankless will not operate.

3) Remove pipes and see if clog can be flushed.

4) Also U-tupe search "delime tankless water heater" and technique used for deliming will be good way to clear out tankless clog and sediment.
Your tankless should be delimed each year anyway.

5) Read your manual cover to cover, and see words 'troubleshoot' and 'maintenance' are used throughout manual. Get acquainted with your water heater and manual, because tankless are maintenance heavy, especially if conditions are not optimal and as unit ages.

6) All costs are energy. Install tank type water heater for ez do-it-yourself repairs and maintenance.
Tank type work under all types of adverse conditions and water pressures and water conditions, and even withstand sediment build-up for several years. Of course tank-type pipes can clog too.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Mar 08, 2011 | Bosch PowerStar AE125 AE125 Whole House...

1 Answer

Hot water tank does not work when shower is on, it does however work when the faucet in bathroom is on. It quit working in the shower about a month ago.


  1. COLD MIX, HEATER DEACTIVATES
    If inlet water temperature is over 70°F due to geographic location, water maybe very hot out of the tap. This requires a lot of cold water to be added with it in order to attain a useable hot water temperature. The addition of too much cold water will overpower hot water demand from the tankless water heater. This slows the flow within the tankless water heater, decreasing it below activation point, which shuts off the heater. The end result is nothing but cold water coming out of the outlet. See: TWH E2-04 Overcoming fluctuating temperatures [PDF].
  2. FLUCTUATING WATER PRESSURE
    If the water pressure in the home is erratic and the water flow is not consistent while a tap is opened, then the temperature of hot water will fluctuate. The minimum water pressure for the home should be 30psi or greater. For people on well systems the minimum pressure range is 30-50psi. The use of a pressure reducing/regulating valve is an effective way to maintain constant water pressure to the water heater. Watts brand 25AUB- ¾" or N35B-¾" pressure reducing/regulating valves or equivalent is suggested.
  3. CHANGING FLOW RATE
    Major changes in flow rate can adversely affect the output water temperature of the heater. Increases from one major fixture running to multiple fixtures running at one time can cause the temperature to fluctuate. Stay within the heater's specifications. See: TWH E2-03 Outlet temperature vs. flow rate [PDF].
From the Bosch website.

Good Luck,
Gary

Dec 16, 2010 | Bosch PowerStar AE125 AE125 Whole House...

1 Answer

What sort of lpm rate would suit a normal home with fairly good water pressure


This is just what I would say for an average family of four during hours of peak usage. You should be okay with a flow rate of twenty to twenty four lpm,assuming you have rapid enough recovery. This is based on one shower at a time and not running dishwasher or clothes washer at the same time.If you are using hot water from multiple fixtures then increase accordingly.Hope this helps. Thanks

Nov 10, 2010 | Rheem Tankless Hot Water Heater...

1 Answer

Low pressure at hot water tap


Most tankless heaters will normally restrict the hot water output in order to maintain a stable outlet temperature; however, this should only be noticed if you have several hot water fixtures open. If you are only seeing the problem when running a single fixture, then the problem is probably one of these items:

1) clogged aerator on your fixture - easily fixed by removing and cleaning the aerator with a pair of vice grips

2) clogged inlet filter for your tankless - the inlet filter is located on the incoming cold water connection. It has a black cylindrical cap. To remove it, make sure to first turn off your water to the heater and then unscrew the cap to remove the filter. Instructions can also be found in your owner's guide.

Oct 12, 2010 | Noritz Residential Heaters Tankless Water...

1 Answer

Takes too long for hot water.


You need a recirculating line. You will have to hire a plumber to run a water line from the farthest fixture or to the fixture you are concerned about on the hot side and return it back to the water heater. this will cause hot water to constantly run throught the hot water line (via the recirculating line) and when you want to draw water from the fixture, you will already have hot water right at the line.
I know this works with standard tank water heaters, but it is a lil trickier with rinnai units(but very possible) if your plumber pleads the 5th and tries to sell you another unit call the Rinnai manufacturerand ask them how.

Jun 12, 2009 | Rinnai Water Heaters

1 Answer

Does grundfos rcp96 pump work with bosch 2400 eo tankless heater?


What is your reason to have a recirc line on your water heater does the heater sit to far away from a certain fixture? If you put a pump on your tankless waterheater then your heater will continually fire till the call for hot water is stopped. Yes you normally do need a seperate line installed for a recirc line usually from the water heater to the farthest fixture away. If your problem is taking to long to get hot water then I suggest installing a second heater closer to problem area.

Apr 16, 2009 | Grundfos RCP-96 Recirculation Pump for...

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