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Bosch Hydropower 16H instantaneous gas hot water unit not firing??

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  • qnator Jan 03, 2009

    same problem, does not ignite.

    common -

    http://www.productreview.com.au/showitem...

    lots of people with the same problem and no help from bosch. sounds like a garbage product


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We had this problem and no plumbers were able to fix it. Finally we got someone from Bosch around and they found part of the ignitor had been installed upside down, since then no problems at all.

Posted on Oct 17, 2010

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We have a brand new Rinnai gas heater, Avenger 25. The first two times we operated it, it was fine, but since then a code 13 comes up after 3-4 minutes and the heater turns off. Rinnai said we could...


These are the possible issues with the unit, based on the code list and description

Check that the gas is turned on at the water heater and gas meter. Check for obstructions in the flue outlet.
Ensure gas line, meter, and/or regulator is sized properly.
Ensure gas type and pressure is correct.
Bleed all air from gas lines.
Ensure proper Rinnai venting material was installed.
Ensure condensation collar was installed properly.
Ensure vent length is within limits.
Verify dip switches are set properly.
Ensure appliance is properly grounded.
Disconnect keypad.
Disconnect EZConnect™ or MSA controls to isolate the problem.
Check power supply for loose connections.
Check power supply for proper voltage and voltage drops.
Ensure flame rod wire is connected.
Check flame rod for carbon build-up.
Disconnect and re-connect all wiring harnesses on unit and PC board.
Check for DC shorts at components.
Check gas solenoid valves for open or short circuits.
Remove burner plate and inspect burner surface for condensation or debris.

Clean inlet water supply filter.
On new installations ensure hot and cold water lines are not reversed.
Check for bleed over. Isolate unit from building by turning off hot water line to building.
Isolate the circulating system if present. Open your pressure relief valve; if unit fires, there is bleed over in your plumbing.
Ensure you have at least the minimum flow rate required to fire unit.
Ensure turbine spins freely.
Measure the resistance of the water flow control sensor.
Check for DC shorts at components

In case of a problem or clarification or my solution was insufficient, don't hesitate to post me a reply.

If you are satisfied, rate my solution with the "thumbs" or (even better) add a testimonial.

May 31, 2011 | Air Conditioners

1 Answer

We have no hot water!!!! We have a powerstar #45-557701 for a year now the water would get hot then cold then warm well now we have no hot water at all... How do I even try to fix this problem?


If you're using well water that may be the problem. As, well water has a lot of minerals that will cause scale and clog the intake & heater coils. Cleaning/Flushing the unit with White Vinegar and water (50/50) may solve the problem. Also, If it gets hot fast and then stops, one of the "Thermal Cutout Switches" is cutting out. The water flow it probably blocked. On many models they have a "Screen" and or a "Grommet" that you can clean out. This in particular is what you need to clean.

To further investigate what may be causing the problem, Call Bosch Tech Support.

If you have a gas fired unit call
800-642-3111
If it's electric call
866-330-2729

Hope this helps solve your problem. Please let me know.

Feb 14, 2011 | Air Conditioners

1 Answer

Rinnai infinity standing in the shower and it suddenly goes cold for a few seconds no other water been run in the house or it goes cold and goes to a trickle then comes on again. Could the heat ex changer...


We are a bit confused by the device that you are using to heat the Hot water with- Is it an instantaneous HW heater?--
They are pressure sensitive-- Could it be, that your water pressure drops momentarily, (which causes the instantaneous heater to shut down its flame-- and you get a pulse of Cold water.)

If your hot water is a tank-- It is possible that something is cycling your hot water away-- like rinse pulses on the Washing machine)-- or your dishwasher?

Tell us more about the Rinnal Air Conditioners and what they have to do with Hot water and your SHower?

Tell us more-

Mack B

Jan 23, 2011 | Rinnai Air Conditioners

1 Answer

Can i adjust a flow sensor on a instantaneous hot water service


No, what do you want to achieve? Hotter water or turn on at a lower flow? The flow shitches are are either weighted switches or resistors, depending upon who makes it.

Sep 15, 2008 | Air Conditioners

1 Answer

Hi, I have a Bosch WR250 tankless gas instant water heater. My problem is i am not getting a spark at the pilot when the hot water is turned on,the red light flashes after 10sec. I can here the...


Flashing red light indicates not enough pressure on the input cold water. I had this problem when the small filter was gummed up with ****. Remove the water input nut and inside is a small removable mesh filter. Also the hydro power unit that you hear whirring has a even finer mesh filter. It can also be cleaned out.

Jul 06, 2008 | Air Conditioners

1 Answer

Our Bosch 16H Hydropower shuts off 30 secs to a minute after heating has started. We have used a variety of settings and only when we have the lower dial on minimum (fully anticlock) and the slider above...


Hi John

The manual is very limited in information it said to check there is
  • high water flow going through your system
  • and check your gas settings is correct!
  • The slide adjustment is your gas flow, which regulates your temperature
  • I have also increase the the gas regulator, which increases the gas flow
I have also been told its not a good idea to have a water saving head on your shower as this restrict the water out put.

Jul 03, 2008 | Air Conditioners

2 Answers

Bosch TF 250 hot water service, can not get the pilot light to stay on...


thre is a sensor thaat goes from the gas valve to the pilot that is called a themocouple change that and you will have no more problem

May 26, 2008 | Air Conditioners

1 Answer

Bosch h16 hydropower gas water system


Cost for both parts and labor vary for one end of the country to the other so I would have no idea what the cost would be in your area.

May 10, 2008 | Air Conditioners

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