Hot water system only putting out warm water.

Posted by Tom S.


East Victoria Park WA 6101, Australia

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Due date
Tuesday, 15th Aug 2017
Oldish Bosch instant hot water system only putting out warm water. I have adjusted the water flow and gas flow without it fixing the issue.

I need someone with some experience with these units to trouble shoot and give me an indication of what the problem is and hopefully fix. Obviously would prefer not having to replace unit!

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Hi. How old is the unit?

The Bosch10H model is a very poorly manufactured unit. Would highly recommend switching to a 10P, storage unit or Thermann/Rinnai 20L
Tom S.poster
Thanks for the response Jos W. I have no idea how old the unit is. But from the look of it I'd say at least years. There is a lot of corrosion around the fittings.
Hi Tom it needs a gas service the kit alone is $88. We can check the gas reg aswell to make sure your getting Tymhe required amount of gas flow . Please note however if the unit is over 10 years old somtimes the water valve component corrodes to the gas valve making them not serviceable. These units dont have an element!!
Tom S.poster
Thanks for the reply Alec here are a few photos with the cover off.
Tom S.poster
If it is over 10 years old the element is on its way out.
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