Manuals for Siemens Boilers

Below you can find all models Siemens Boilers for which we have manuals available. Also view the frequenty asked questions at the bottom of the page for useful tips about your product. Is your model not on the list? Please contact us.

Is your product defective and the manual offers no solution? Go to a Repair Café for free repair services.

Frequently Asked Questions

Our support team searches for useful product information and answers to frequently asked questions. If you find an inaccuracy in our frequently asked questions, please let us know by using our contact form.

My boiler will only produce lukewarm water, why is that? Verified

This probably means that the thermostat is broken. Contact the manufacturer for advice.

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Is it useful to switch off my boiler during absence or vacation? Verified

Many modern boilers are very energy efficient. During an absence or vacation that lasts 1 week or less it will take more energy to heat the water again than to keep the water at the current temperature. During absences that last longer than 1 week it might save energy to switch off the boiler.

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There is water coming from the pressure relief valve, is that normal? Verified

Yes, a boiler is a pressure vessel. When pressure gets too high, the boiler will lower this by releasing water through the pressure relief valve. The installer of the boiler should have attached proper drainage.

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What is the best place to install my boiler? Verified

The best place to install the boiler is close to the location where the most warm water will be used (ie: bathroom). This ensures a quick supply of warm water and minimal heat loss.

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What is the difference between a boiler and a gas boiler? Verified

A boiler heats the water before you want to use it. A gas boiler heats the water at the moment that it is needed. This means that with a regular boiler, you can run out of warm water when the reservoir is empty.

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Latest comments

Manual Siemens DG30025 Boiler
Daniel k. 27-03-2022
Hello, I recently moved and have a boiler in the bathroom. Since I have no experience with it, I wanted to ask how to set it up best?


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Siemens DG30025 Boiler
Manual Siemens DG15602 Boiler
Peter Kok 08-01-2022
Boiler light is not lit. Is the device secured?


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Siemens DG15602 Boiler
Manual Siemens DG10025 Boiler
wolfgang steinberger 28-01-2021
how much electricity does the boiler need


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Siemens DG10025 Boiler
Manual Siemens DH18100 Boiler
Mike Babic 21-01-2021
What kind of the kitchen facet I need to install for this boiler. Which is an appropriate facet for it, the low or high-pressure facet is needed? Please advise?


Siemens DH18100 Boiler
Manual Siemens DG10025 Boiler
Ted Modlich 28-03-2020
Overpressure valve runs out of water, but the dripping is annoying because my bedroom is right next to it. Is it possible to contain this drop? And when does the siphon have to be replaced because of limescale deposits? Would descaling also work?


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Siemens DG10025 Boiler