Webasto DBW 2010 - Fuel Supply System, Bleeding

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SERVICING DBW 2010/2020/300 COOLANT HEATERS
heater has responded because the heater has not been
bled properly.
Reset temperature limiter (allow temperature limiter to
cool, self resetting) and repeat complete bleeding
procedure.
NOTE: The heater may be equipped with an
automatically resetting temperature limiter. The
manual reset is not necessary.
8.8.2 FUEL SUPPLY SYSTEM, BLEEDING
When switching the heater on the fuel pump pulls fuel
from the fuel tank to prime the complete fuel supply
system.
Should no combustion be achieved with the first start
attempt, switch the heater off and on again.