Question about Bosch AquaStar Indoor Natural Gas Tankless Water Heater with Vent Hood #125

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The pilot will not come on when i try to ignite it

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Still can't find where you light the pilot light for the hot water heater on a self igniting factory installed heater on a 1997 Pace Arrow.


Generally, if a RV water heater is self igniting, then it is not designed to be lit manually. If you remove the outside vent cover door, then the unit can be observed. The self igniter should be visible at a point of where the pilot light is located. The problem with trying to light the water heater manually is that the circuit that activates the igniter also turns on the gas at the same time. If the igniter is not getting power, then most likely the valve to turn on the gas is not getting power either. If the problem is that the igniter itself has failed, then it may be possible, but unlikely, that with someone inside activating the turn on switch and a flame being applied to the pilot light area, at the same time, the pilot may light.

Oct 04, 2015 | Water Water Heaters

1 Answer

Bosch 1600 h not lighting pilot light


If your getting a spark the generator should be ok I would clean the pilot injector and re try

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1 Answer

Pilot light won't ignite


may need a thermo couple small copper tube screws in by the pilot lite

May 06, 2014 | Water Heaters

1 Answer

Need to purge air from gas line for water heater


It could be that the gap for the igniter is too big Try lighting it manually There should not be that much air in the line .

Jun 14, 2017 | Rheem Water Heaters

1 Answer

Pilot not light


Sounds like you have a hydro-generator on this unit. Check the output on the hydro-generator it should be about 1.5V DC. If not clean the inlet screen and check your water pressure. Water pressure less than 30 PSI will cause issues. If you have 1.2V-1.5V DC make sure the power switch is on. If the power switch is on replace the control unit. I sell parts for Bosch units only!

Apr 02, 2014 | Bosch & Tankless LP Hot Water Heater

1 Answer

When trying to ignite electric pilot light, when pushing button to ignite, pilot doesnt spark to create flame


Pull out sparking rod and lightly polish with fine steel wool. then put back together. Could be in control box but I doubt it. You will probably see mild corrosion on rod.

Apr 02, 2014 | State Water Heaters 50 Gallon Select SL...

1 Answer

The ignition doesnt ignite in my water heater


if you know how turn off the gas try to clean it
first then turn the gas back on

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1 Answer

Igniter sparks after several tries but the pilot will not light


no gas is getting to pilot light. if all else fails change thermal coupling, if this is bad no gas will come out.

Nov 05, 2009 | Water Heaters

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