Question about Home

Open Question

My Bosch tankless GWH 1600 H L wont ignite. The hydro generator is spinning the microswitch flips but there is no clicking and no fire. It will NOT light by hand either the Bosch "tech" wont help and I am boiling water on the stove. Hubby is mad that he let me talk him into this. Please help

Posted by on

5 Suggested Answers

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Bosch tankless GWH 1600 H NG won't always ignite

The clicking is a good sign. What are you trying that not working? How is the water flow-is it strong? 1) Turn the flow control button all the way to your left - this will increase the flow.
2) Pull the relief valve to simulate water flow and listen for clicking sound, and hopefully, main burner ignition. ( if installed in basement or kindly use bucket to catch water) The 1600 H NG will automatically shut off firing after 5sec of clicking.
3) How is the venting-use a household digital carbon monoxoide detector to measure any backspill from chimney.
4) Was the gas line disconnected in anyway after heater was installed? Air in the gas line will cause the igniter to click but no gas to fired the main burner.

Todate i have installed 11 Bosch Tankless Heaters -- 9(125 NG) Which is the same as 1600 Series
1(1600H NG) and 1(1600P NG)
Guess which one I having problem with- You guess it, however, the problem is their electrical wiring.

BE CAREFUL IN CALLNG BOSCH TECH. FOR SUPPORT. THE ARE GRILLING YOU TO FIND A LOOPHOLE WITH YOUR INSTALLATION TO RELIEF THEMSELF OF THEIR WARRANTY.

Posted on Mar 24, 2009

mrhotandcold
  • 248 Answers

SOURCE: we have a 3 year old Bosch GWH 425 HN tankless LP

suggest you complain to Borch sometimes lemons get through best of luck

Posted on Oct 30, 2009

  • 1 Answer

SOURCE: I have a Bosch

Having the same problem with mine. Looking for a replacement generator. Seems that if your water pressure or flow is not adaquate your will have this problem. Get worse over time. I took mine apart and it got better then started doing the same thing again. I turn on several faucets to overcome problem. Still it not good. The 1600H does not appear in the Bosch website parts list models. They do say that a third party does the fulfillment in the notes at bottom on other units...maybe call them

Posted on Dec 27, 2010

SOURCE: roblem with the Bosch 1600H-NG

Problem could be air supply, gas supply, venting, part failure or combination of listed things.

Best place to start is manual.
http://www.boschhotwater.com/BoschModel1600H/FeaturesandSpecs/tabid/1024/Default.aspx

Typical 1600 manual shows troubleshoot starting page 19
http://www.boschhotwater.com/Portals/7/TechManuals/1600H_English_0606.pdf

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

BOSCH error codes:
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/2400ESTechSupport/Troubleshooting/tabid/1295/Default.aspx

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.

Posted on Mar 05, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

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

Nov 16, 2014 | Bosch 1600H-LP Liquid Propane AquaStar...

1 Answer

No spark Bosch tankless GWH 1600 H NG


On a 1600H for god sakes give the Tech the S/N and the color code on the wiring at the flow sensor that starts the hydro sparker. They changed the thing in Mfr and there are 2 different parts. And also rebuild the water valve occasionally like every 3 years as Bosch recommends even if the cover which guides the pushrod is expensive. FYI we now usually buy a new WV as it\'s more reliable than rebuilding and you get all new parts. It\'s like $125 for a WV vs $59-71 for just the WV cover. Also never run these on very hard water fro a long time or you\'ll never descale em without Whitlam and a long wash out.

Oct 14, 2012 | Bosch 1600H-NG Natural Gas AquaStar...

2 Answers

I have a Bosch Model GWH 1600 H tankless water heater. I have had issues with it since I installed it 2 years ago or should say had it installed.Yesterday I could not get it to ignite or light manually. I...


Igniter can be ordered, but that may or may not be the issue.
Your tankless unit -and- plumbing system need total check-up by trained service technician.
Open following links for Bosch troubleshooting resources including contact Bosch, manuals, error codes, water flow etc.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
http://waterheatertimer.org/pdf/No-Error-Code.pdf
Check electrical outlet with circuit analyzer to make sure polarity is correct.
Typically, gas water heaters, and especially tankless water heaters require yearly maintenance by service technician who can check the gas pressure and supply, venting, electrical connections, PC board, sensors, burner orifices and igniter parts are clean and positioned correctly, vent is draining correctly and not dripping back into combustion chamber, correct temperature is achievable, incoming water temperature is not too cold for temp setting, proper incoming air supply, adequate air supply, no chemicals stored in air supply pathway, filters are clean, plumbing check valves, mixing valves, pressure valves etc are permitting one-way flow of hot water, water is softened to less than 11 grains hardness, water is filtered and not dirty, aerators and other faucet parts are clean and support water flow necessary to activate burner.

Jul 15, 2011 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

Roblem with the Bosch 1600H-NG Natural Gas AquaStar AquaStar Natural Gas Tankless Water Heater... Aquastar gwh 1600 h igniter fails clicks does...


Problem could be air supply, gas supply, venting, part failure or combination of listed things.

Best place to start is manual.
http://www.boschhotwater.com/BoschModel1600H/FeaturesandSpecs/tabid/1024/Default.aspx

Typical 1600 manual shows troubleshoot starting page 19
http://www.boschhotwater.com/Portals/7/TechManuals/1600H_English_0606.pdf

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

BOSCH error codes:
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/2400ESTechSupport/Troubleshooting/tabid/1295/Default.aspx

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 05, 2011 | Bosch 1600H-NG Natural Gas AquaStar...

2 Answers

Aquastar gwh 1600 h igniter fails clicks does not spark


If there is not a clicking sound, it almost always means the main ignition or control unit (box with red and green lights and wires coming from it) is not getting the supply voltage. The voltage is supplied by a generator that is getting energy from the flow of water (the "hydro generator"). First disconnect the wire connector at the hydogenerator and check the voltage while water is running. The manual says you should read 1.6 VAC (I read 2.5 VAC). Make sure your voltage reader is on AC, not DC. If you have at least something like 1 VAC, then the next thing to check is the "microswitch" that allows the hydro generator voltage to reach the ignition unit. To check it, disconnect the other wire connector that is on the black wire coming from the hydrogenerator that is closer to the ignition unit. Then with the water running, stick a small screwdriver in the male plug side to short the two wires in order to bypass the microswitch (per Bosch tech support instructions). You should now here clicking and see the unit work. This is what happened with me and tech support said I needed to order a new microswitch and gave me a part number and telephone. But don't stop reading here. You can see the microswitch when looking up at the underneath of the unit. It's a small white 1x1 inch box-like shape held by 1 screw. After removing it, I noticed the microswitch had a removable cover (which is strange for a switch) and opened it to discover the internal switch can actually move inside because it "automatically adjusts" itself when it is first put in (it stays more firmly, but not rigidly in place when the cover is on). So you can mess up when putting it in. Don't bump it. It can easily get out of its working range of motion, which is why mine stopped working: it was a bad design to use this type switch in this application. So I slide the internal switch back close to the spring side ("default" position), put the cover back on, carefulyl screwed it in place, and now it works.

The purpose of the mechanical microswitch is to not allow the hydroenerator voltage to the ignition unit unless the "pushrod" has opened the main gas supply. It prevents clicking if there is no supply gas, so it is not needed (you can electrically bypass it with a splice) if everything else is working fine. But don't blame me if you do this and for some reason it ruins the more expensive ignition unit. The microswitch is turned on by the pushrod when the pushrod leaves it's default position. The the pushrod moves only about 2 to 3 mm when you turn on the water. You can see the pushrod when you unscrew the microswitch, and you can watch it move. The problem is that the microswitch mounting is not precise enough for the small pushrod movement and the pushrod's default position can change with age of the diaphragm or change in the grease. So their automatically adjusting microswitch that makes up for lack of precision in design and pushrod movement can stop working when the pushrod changes position. My unit was 2 years old.

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

1 Answer

I have a Bosch GWH 1600 Tankless hot water heater. Sometimes it would spark, I would turn water offf an on a few times at the valve, and it would click and start. I took about the Hydro Generator, I...


Having the same problem with mine. Looking for a replacement generator. Seems that if your water pressure or flow is not adaquate your will have this problem. Get worse over time. I took mine apart and it got better then started doing the same thing again. I turn on several faucets to overcome problem. Still it not good. The 1600H does not appear in the Bosch website parts list models. They do say that a third party does the fulfillment in the notes at bottom on other units...maybe call them

Dec 24, 2010 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

Bosch tankless GWH 1600 H NG won't always ignite. The igniter sparks, but doesn't always light the gas. It just clicks. When installed it lit every time, now it takes more and more tries to get it to...


The manual says to hold a match near the pilot while the ignitor is trying. It says that if the unit lights the pilot orifice may be dirty or clogged. Then the manual says to check the voltage on the igniter. It should be 1.3 volts DC minimum if it is not means the electronic control box is defective.

Let me know the status ...Kevin

Mar 29, 2009 | Bosch 1600H-NG Natural Gas AquaStar...

Not finding what you are looking for?
Home Logo

Related Topics:

61 people viewed this question

Ask a Question

Usually answered in minutes!

Top Home Experts

Donni Steen

Level 3 Expert

659 Answers

Tom Chichester

Level 3 Expert

33294 Answers

Brad Brown

Level 3 Expert

15451 Answers

Are you a Home Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...