8 Servicing Work DBW 2010 / 2016
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8.7.4 Replacing thermal fuse
NOTE
The procedure for replacing the thermal fuse with the heater
installed or removed is identical.
Replacing must be carried out according to 9.2.3.
WARNING
Before replacing the thermal fuse on heaters with the 1563/
1564 control unit while installed, the pressure in the cooling
system must be released by opening the radiator cap.
Also allow the heater to cool and provide a catch container
for the escaping coolant if necessary.
8.7.5 Replacing control thermostat
NOTE
The procedure for replacing the control thermostat with the
heater installed or removed is identical.
Replacing must be carried out according to 9.2.4.
8.7.6 Replacing fan thermostat
NOTE
The procedure for replacing the fan thermostat with the
heater installed or removed is identical.
Replacing must be carried out according to 9.2.5.
8.7.7 Replacing thermal fusible link
NOTE
The procedure for replacing the thermal fusible link with the
heater installed or removed is identical.
Replacing must be carried out according to 9.2.6.
8.7.8 Replacing burner head
NOTE
The procedure for replacing the burner head with the heater
installed or removed is identical.
Replacing must be carried out according to 9.2.8.
WARNING
The ignition spark generator is operated with high voltage.
Before the burner head is replaced, the connectors of the wir-
ing harness must be disconnected from the control unit, as
otherwise there is a danger of incurring life-threatening inju-
ries.
8.7.9 Replacing ignition spark generator
NOTE
The procedure for replacing the ignition spark generator with
the heater installed or removed is identical.
Replacing must be carried out according to 9.2.12.
WARNING
The ignition spark generator is operated with high voltage.
Before the ignition spark generator is replaced, the connec-
tors of the wiring harness must be disconnected from the
control unit, as otherwise there is a danger of incurring life-
threatening injuries.
8.7.10 Replacing flame monitor
NOTE
The procedure for replacing the flame monitor with the
heater installed or removed is identical.
Replacing must be carried out according to 9.2.13.
WARNING
The ignition spark generator is operated with high voltage.
Before the flame monitor is replaced, the connectors of the
wiring harness must be disconnected from the control unit,
as otherwise there is a danger of incurring life-threatening
injuries.
8.7.11 Replacing combustion chamber
NOTE
The procedure for replacing the combustion chamber with
the heater installed or removed is identical.
Replacing must be carried out according to 9.2.17.
WARNING
The heater is operated with high voltage. Before the combus-
tion chamber is replaced, the connectors of the wiring har-
ness must be disconnected from the control unit, as
otherwise there is a danger of incurring life-threatening inju-
ries.
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