Siemens DE2427415: A fault, what to do? Cause Solution Who

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A fault, what to do?

If your appliance does not operate as required, it is often due to a very minor problem. Please check whether you can remedy 

the fault yourself by using the following guidelines. You will save yourself the costs of an unnecessary visit by customer service 

personnel.

Fault

Cause

Solution

Who

Water flow-rate is too low.

The filter in either the water tap or 

the showerhead is clogged 

Remove the filter and either

clean it or descale it.

Customer

The filter in the corner regulating 

valve is clogged.

Get a servicing expert to clean the 

filter.

Servicing 

expert

The filter upstream from the check 

valve in the cold water supply inlet 

is clogged.

Remove the filter and either

clean it or descale it.

Servicing 

expert

The desired water temperature is 

not reached.

The continuous-flow heater is 

connected to a thermostatically-

controlled water tap.

Set the temperature on the continu-

ous-flow heater to “max”.

Customer

The power limit has been reached. 

Water flow-rate is too high and/or 

the cold water supply temperature 

is too low.

Reduce the flow-rate at the water 

tap supply.

Customer

By a qualified professional:

use the angle valve to regulate the 

flow-rate. 

Check the flow-rate limiter or re-

place it with a smaller one.

Servicing 

expert

The water is not sufficiently warm.

The fuse in the house electrical in-

stallation has tripped/blown.

Check the fuse in the house electri-

cal installation.

Customer

The appliance‘s automatic circuit 

breaker has been tripped.

Get the appliance‘s automatic cir-

cuit breaker checked by an electri-

cian. Check the permissible supply 

temperature.

Servicing 

expert

The power limit has been reached. 

Water flow-rate is too high and/or 

the cold water supply temperature 

is too low.

By a qualified professional:

use the angle valve to regulate the 

flow-rate. 

Check the flow-rate limiter or re-

place it with a smaller one.

Servicing 

expert

The power selector switch is set 

incorrectly.

Set the power selector switch to 

suit the appliance.

Servicing 

expert

From time to time, cold water 

flows out.

The air sensor in the appliance de-

tects air in the water and momen-

tarily switches the heating element 

off.

After a few seconds, the continu-

ous-flow heater automatically goes 

back into operation.

Continu-

ous-flow 

heater au-

tomatically 

resolves 

problem

Winter operation:

The desired water temperature 

leaving the tap is no longer 

reached.

The supply temperature has 

reduced.

Reduce the water flow on the taps 

until the desired water temperature 

is reached.

Customer

The appliance does not start 

(heat), no water flows

Power failure or initial start-up.

Starts rinsing: 

Open the warm water tap and 

 allow water to flow for at least 

1 minute (flow-rate at least 6 litres 

per minute). Only then (for safety 

reasons) will the appliance begin 

to heat.

Should the appliance not start 

because of a reduced flow-rate, 

 remove the perlator, shower head 

or similar before start and repeat 

the process.

Customer

If the fault could not be eliminated, please call customer service.