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Maintenance
6 720 608 992 (2018/01)
7 Maintenance
To ensure that gas consumption and the environmental load
(pollution, etc.) remain as negligible as possible over time, we
recommend the appliance be maintained on an annual basis.
These jobs can only be done by a Bosch authorised service
agent.
7.1 Flue gas safety device
Operation and precautions
This probe verifies the condition of flue gas evacuation and, in
case of malfunction, it automatically turns off the heater. This
prevents combustion gases from entering the room where the
gas heater has been installed. The probe restarts after a reset
period.
If the heater turns off during operation:
▶ Ventilate the room.
▶ After 10 minutes, turn on the heater once again.
Call a qualified technician if the same thing happens again.
Maintenance*
If the probe malfunctions, proceed as follows:
▶ Unscrew the probe fixing screw.
▶ Detach the ignition unit terminal.
▶ Replace the faulty part and re-assemble in reverse order.
Operating check*
To check the correct operation of the flue gas safety device,
proceed as follows:
▶ Remove the combustion gases flue pipe.
▶ temporarily replace it with a pipe (approximately 50 cm
long) blocked at one end.
▶ The pipe must be installed vertically.
▶ Turn on the heater at nominal power and with the
temperature selector adjusted to maximum temperature.
In these conditions, the heater must turn off no more than
two minutes afterwards, at most. Remove the pipe and
replace the flue pipe.
* These procedures must be performed by a qualified installer/
service agent.
DANGER:
Failure to perform maintenance procedures can
lead to appliance malfunction, errors, service
calls and loss of warranty.
Maintenance must only be performed by a
qualified technician. Maintenance information
is contained in a service manual available to
licenced technicians upon request from Bosch.
DANGER:
The probe must never be turned off, modified or
replaced with a different part under any
circumstances.
DANGER:
The user must never touch the flue gas safety
device.
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