STIEBEL ELTRON DEM 3 - 6 Troubleshooting

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6. Troubleshooting
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The appliance will not
start in spite of a fully
open DHW valve.
There is no voltage at the
appliance.
Check the fuses/MCBs in
your fuse box.
The aerator in the tap is
scaled up or dirty.
Clean and/or descale the
aerator or replace the
special aerator.
The water supply has
been interrupted.
Vent the appliance and
the cold water inlet line
(see chapter “Settings”).
The required
temperature is not being
reached.
The maximum
temperature set inside
the appliance is too low.
Have your qualified
contractor adjust the
maximum temperature.
The appliance operates
at its output limit.
Reduce the flow rate.
If you cannot remedy the fault, notify your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate (000000-0000-000000).
DEM . .
Nr.: 000000-0000-000000