Webasto Thermo 90, Workshop Manual

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8 Servicing Thermo 90
802
8.4 Heater Test Run
WARNING
The heater must not be operated, not even with timer, in
enclosed areas like garages or workshops not equipped
with an exhaust venting facility.
8.5 Servicing
Before or after each heating season the following
servicing should be performed to maintain the heater's
functional reliability:
• Clean heater exterior (prevent the ingress of water).
• Examine electrical connections for corrosion of
contacts and for security.
• Check exhaust combustion air lines for damage and
for foreign matter and contamination.
• Check fuel lines and fuel filter for leakage.
• Check coolant circuit and circulation pump for
leakage.
• Check hoses for cracks.
• Replace fuel filter if installed.