How is liquid lpg system set up? i have a aqua star mod.125vp that i would like to install in my home, the liquid lpg. is the part im not shure about. thanks d.r.

Without having gauges on the input and output side, it is hard to say, check for screens on the in and out connections.

http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

Call Bradford White or installer

Gene
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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Water in the gas valve is DANGEROUS! The major question is did the water come from a leaking heat exchanger or the product of combustion? If it is from the heat exchanger it may be covered under the warranty (if the installation is proper). If it is from condensate in the flue pipe, it is from an improper installation. If you go to bosch-climate.us you can find a service provider in your area. I service a very large part of NY, some of NJ (Northern) and all of CT.

If that is the flow control valve its been supersceded.

Problem is not clear

Before calling service technician, open following link for Bosch troubleshooting resources including contact information for Bosch:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Sounds like scale build up in your hot water heater. Aqua-Pure makes a nice scale inhib thats installed on your cold water supply to your hot water heater. Parts and all is about $150.00. Add labor and your set unless you can solder then its a DIY. Homedepot sells the filtration device by Aqua-Pure.

Question is though, why would this fail after only six months?

renew therm/ control

Bosch has had problems with these heaters for sure. They are the best known thing out there in the market.They are mostly responsible for the bad rap being given to all tankless heaters, but a big part of the problem is installation. They are being sold to homeowners at box stores as DIY kits. These are not units to be homeowner installed, venting and fuel requirements are different from regular heaters and they will not function correctly if improperly installed. I have installed several of the Rannai units over the past few years without any issue whatsoever.

you should have no more then 75lbs of water pressure going thru the unit and min of 60lbs these are the pressures they are designed to work under, you may have to add a regulator to the system