Combust Fan Shorted; Combust Fan Speed Incorrect; Combustion Fan Open - Mercedes-Benz Sprinter 2003 Manual

CABIN HEATER
Symptom List:

COMBUST FAN SHORTED

COMBUST FAN SPEED INCORRECT

COMBUSTION FAN OPEN

Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be COMBUST FAN SHORTED.
COMBUSTION AIR FAN
TEST
1 WARNING: NEVER OPERATE THE HEATER IN AN ENCLOSED AREA
THAT DOES NOT HAVE EXHAUST VENTILATION FACILITIES. ALWAYS
VENT THE EXHAUST WHEN OPERATING THE HEATER. FAILURE TO
FOLLOW THESE INSTRUCTIONS CAN RESULT IN PERSONAL INJURY
OR DEATH.
WARNING: ALLOW THE HEATER ASSEMBLY TO COOL BEFORE PER-
FORMING A COMPONENT INSPECTION/REPAIR/REPLACEMENT. FAIL-
URE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN PERSONAL
INJURY OR DEATH.
CAUTION: DO NOT PERFORM THIS TEST UNLESS DIRECTED HERE BY
THE HEATER PRE-TEST. ALWAYS PERFORM THE HEATER PRE-TEST
PRIOR TO PERFORMING ANY OTHER TEST FOR THE RESULT TO BE
VALID.
Turn the ignition off.
View repair
Repair
POSSIBLE CAUSES
ACTION
Replace the Cabin Heater Assembly or Heater Booster Assembly
in accordance with the Service Information.
Perform HEATER VERIFICATION TEST - VER 1.
76
APPLICABILITY
All