Thermo 90 S / Thermo 90 ST 8 Service work
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8 Service work
8.1 General
This section describes the service work that can be
carried out on the heater when it is installed.
8.2 Work on the heater
Disconnect the main power cable from the vehicle’s
battery before carrying out any work on the heater. The
main battery power must not be disconnected whilst the
heater is operating or running on as a result of the risk of
the heater overheating and the overheating guard circuit
thus being tripped.
If you wish to carry out extensive repair work on the
heater, it may be a good idea to remove it completely.
After working on the heating circuit, top up with a coolant
mixture of water and antifreeze according to the
manufacturer’s instructions and carefully bleed the
heating circuit.
Refer to the relevant installation instructions and the
installation proposal for the heater for the specific vehicle
for repairs that necessitate the installation position being
changed.
8.3 Work on the vehicle
CAUTION
A temperature of 90 °C must not be exceeded in the
vicinity of the heater in any circumstances (for example
when completing painting work on the vehicle). See
section 4.
