14 | Basic Troubleshooting
14
Basic Troubleshooting
14.1
General Information
This section describes basic troubleshooting procedures. Troubleshooting is normally limited to the isolation
of defective components.
CAUTION
Troubleshooting requires expert knowledge about structure and theory of operation of the heater
components and may only be performed by Webasto authorized personnel.
Before troubleshooting, check for and eliminate these defects:
– Blown fuses
– Fuel supply (plugged fuel filter)
– Corrosion on battery terminals, electrical wiring, connections and fuses
–
Loose contact on connections
IMPORTANT!
After any correction of a defect a functional test must be performed.
NOTE
Before each repair on the heater, the fault memory must be read out with the Webasto Thermo Test
PC Diagnosis. Exist- ing faults must be printed before deleting and made available to the Webasto
Hotline or the Warranty Department.
At low temperatures and with no wind, a minor amount of smoke and/or a slight odor may be noticeable
during starting and/or burn-out.
The occurrence of fog with an exhaust system not warmed through or in case of unfavorable weather
conditions is normal and cannot be avoided.
Smoke: exits directly from the exhaust end section. Fog: becomes visible just a few centimeters after the
exhaust tailpipe.
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