Question about Bosch 1600H-NG Natural Gas AquaStar AquaStar Natural Gas Tankless Water Heater...
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
We looked into this problem ourselves... On our unit there is no wind or drafting problem that could blow out the pilot but still it would often lite and then go out or not light at all (just clicking from the ignitor sparking). I removed the right angled elbow tubing which channels the gas for the pilot from the pilot valve to the ignitor. then manually lit it at the valve (WATCH OUT THIS CAN LEAD TO EXPLOSION) DO not do this unless you are qualified) WE got our hair singed when the main valve opened and the burners lit from that distance..! poof! WOW that was exciting.... anyway we found that if we lit the pilot at the valve, though it fluctuated, it stayed lit... So why would it stay lit at the valve and not at the other end of the elbow which directed it to the igniotor spark and teh burners? It appeared to me that the little "spring" looking receiver which is the destination of the ignitor spark was too close to the exit tubing and did not have enough oxygen in order to light consistently. This seemed to be confirmed by more consistent lighting of the pilot if I blew gently in that direction while it was trying to light. The Solution I have use and is working so far is to streche the little spring out and upward so as to light the pilot a little further away from the exit of that tubing and so far it is lighting every time! At least with the entire front panel/cover ( the large white three sided one with all the controls knobs etc. in it) removed. I hope it works when I replace that...
Posted on Dec 09, 2010
It sounds like the thermal coupling ( sorry if its spelled wrong) it will be under warranty call them. Bosch heater have a lot of probs...thats great for me the plumber but bad for yall. They sould cover it under the warranty.
Gas Products Technical Support: 800-642-3111
Electric Product Technical Support: 866-330-2729
Posted on Feb 04, 2009
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. We cleaned ours to no avail. Then the manual says to check the voltage on the igniter. It should be 1.3 volts DC minimum. I just checked mine, and it was under .85 volts DC. According to the manual that means the electronic control box is defective.
Posted on Mar 24, 2009
TEMPORARY FIX FOR HOT SHOWER NOW, light @ ignitor with a lighter with metal tube, not a match. I have had a Bosch 1600 ng for about two years now & we absolutely love it! However we have had problems with the unit not lighting twice. The voltage checked out to be a little low (@ 1.0vdc) but still sparking fine, this is the clicking sound. To fix I pull off the little tube with two screws, be careful not to loose screen between gas nozzle & tube, blow out & adjust spring in end of tube closest to ignitor. I use a phillips screwdriver to push in, just move it to adjust and it should light every time. :)
Posted on Aug 13, 2011
I spoke with Bosch. They said I had a bad microswitch. They instructed me to disconnect the wire going to the microswitch and then short out the end going to the ignitor with a paper clip or screwdriver while the hot water was running. As soon as I did this the water heater sparked up and hot water started running. They told me the microswitch was an "un-necessary" backup switch.
Posted on Mar 06, 2014
Check the voltage on the Orange Wire on the right side of the unit...it should be around 1.3VDC while sparking. If not then just like wengerplumb said, defective box.
While sparking does the pilot light with a bbq lighter? If so try manually bending the pigtail at the tip of the pilot tube to direct the flow of gas towards the spark.
Posted on May 06, 2009
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.
Typical 1600 manual shows troubleshoot starting page 19
Bosch has online tech support form:
BOSCH error codes:
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Posted on Mar 05, 2011
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Posted on Jan 02, 2017
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