8 Servicing Work DBW 2010 / 2016
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8 Servicing Work
8.1 General information
This section describes the servicing work that can be carried
out on the heaters when they are installed.
8.2 Work on heater
The main battery power must not be disconnected whilst the
heater is operating or slowing down as a result of the risk of
the heater overheating and the overheating guard thus being
tripped.
If you wish to carry out extensive repair work on the heater,
it may be a good idea to remove it.
After work is performed on the heating circuit, a coolant mix-
ture of water and antifreeze must be added in accordance
with the vehicle manufacturer's specifications and the heat-
ing circuit must be bled.
8.3 Work on vehicle
IMPORTANT
A temperature of 85 °C must not be exceeded in the vicinity
of the heater under any circumstances (e.g. during painting
work on the vehicle).
8.4 Test run of heater
The heater may not be operated in closed rooms, such as
garages or workshops, without exhaust extraction, not even
with time preselection.
8.5 Maintenance work
The following maintenance work must be carried out to
maintain the functional reliability of the heater:
• The openings of the combustion-air intake pipe and the
exhaust-gas opening must be checked for soiling and
cleaned.
• Outside the heating period, the heater is to be operated
approximately every 4 weeks for 10 minutes with the ve-
hicle heating set to "hot" and the vehicle engine cold.
This prevents starting difficulties.
• When the coolant for the vehicle engine is replaced, care-
ful bleeding of the heater and the circulation pump must
be ensured after bleeding the vehicle cooling system.
If the fill level of the coolant is low, it must be topped up
according to the vehicle manufacturer's specifications.
• The fuel filter or the filter insert must be replaced at least
once a year, and with heavily soiled fuel more often, to
prevent malfunctions.
• If leaks occur, the fuel pump and the fuel lines must be
replaced immediately, and otherwise every 5 years.
• The heater should be checked by an authorised Webasto
dealer at regular intervals, however at the latest at the
start of the heating period.
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