NO.1 INSUFFICIENT AIR (OR NO AIR) BLOWN FROM VENTS

id070300800400

1

Insufficient air (or no air) blown from vents

DESCRIPTION

• Problem with each vent and/or duct.

POSSIBLE CAUSE

• Malfunction in VENT mode system (Steps 1-4)
• Malfunction in HEAT mode system (Step 5)
• Malfunction in DEFROSTER mode system (Steps 6-8)

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT TO SEE WHETHER MALFUNCTION IS IN VENT MODE OR OTHER MODES

• Does air blow out when in the VENT mode?
Yes
Go to Step 4.
No
Go to the next step.
2

INSPECT VENT

• Is the vent clogged?
Yes
Remove obstruction, then go to Step 8.
No
Go to the next step.
3

VERIFY THAT DUCT IN DASHBOARD IS INSTALLED

• Is the duct in the dashboard properly installed?
Yes
Inspect the duct for clogging, deformation and air leakage, then go to Step 8.
No
Install the duct securely in the proper position, then go to Step 8.
4

INSPECT TO SEE WHETHER MALFUNCTION IS IN HEAT MODE OR DEFROSTER MODE

• Does air blow out when in the HEAT mode?
Yes
Go to the next step.
No
Inspect the vent for clogging, then go to Step 8.
5

INSPECT DEFROSTER MODE

• Does air blow out when in the DEFROSTER mode?
Yes
Operation is normal. Recheck malfunction symptoms.
No
Go to the next step.
6

INSPECT VENT

• Is the vent clogged?
Yes
Remove obstruction, then go to Step 8.
No
Go to the next step.
7

VERIFY THAT DEFROSTER DUCT IS INSTALLED

• Is the defroster duct properly installed?
Yes
Inspect the duct for clogging, deformation, and air leakage, then go to the next step.
No
Install the duct securely in proper position, then go to the next step.
8

CONFIRM THAT MALFUNCTION SYMPTOM DOES NOT RECUR AFTER REPAIR

• Does air blow out?
Yes
Troubleshooting completed.
Explain repairs to customer.
No
Recheck malfunction symptoms, then repeat from Step 1 if the malfunction recurs.