Question about Bosch Water Heaters
New batteries, rebuilt valve assembly, new microswitch assembly, new diaphragm...all to no avail. Microswitch does not click when it doesn't work. Playing with adjustment at those times doesn't help. I'm thinking it may be a bad control unit or bad ground to control unit. What else could it be?
Posted by Anonymous on
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Posted on Jan 02, 2017
if you have incorrect gas line size when it kicks on the lack of gas pressure to the unit will cause a wistling. make sure you have enough gas to the unit
Posted on Jul 29, 2009
You have to fix this leak around the water valve before
it causes damage to your equipment.
1. Close the water supply valve going to your tankless
2. Unplug or close the natural gas valve.
3. Now, you can work fixing the leak.
4. Once completed, you can proceed to open the
natural gas valve as well as the water supply valve.
5. Then, have it tested to get it done.
Posted on Nov 28, 2009
SOURCE: 5yr. old aquastar 125x lp
The gas valve makes a single click sound when the pilostat shuts off. That is a safety holding coil for units with standing pilot lights and closes if it thinks the pilot went out. In electronic ignition, the same holds true except the sensor is electronic.
Posted on Mar 31, 2011
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