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

BHE070301038W03

1 | Insufficient air (or no air) blown from vents.
DESCRIPTION | • Problem with each vent or duct or both. • Airflow mode does not change.
POSSIBLE CAUSE | • Malfunction in airflow mode actuator (Step 1) • Malfunction in VENT mode system (Steps 2-5) • Malfunction in HEAT mode system (Step 6) • Malfunction in DEFROSTER mode system (Steps 7-9)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT AIRFLOW MODE ACTUATOR • Inspect airflow mode actuator. (See AIRFLOW MODE ACTUATOR INSPECTION.) • Is it normal? | Yes | Go to next step
No | Repair or replace malfunctioning part in accordance with further inspection result. (See AIRFLOW MODE ACTUATOR INSPECTION.)
2 | INSPECT TO SEE WHETHER MALFUNCTION IS IN VENT MODE OR OTHER MODES • Does air blow out when in VENT mode? | Yes | Go to Step 5.
No | Go to next step.
3 | INSPECT VENT • Is vent clogged? | Yes | Remove obstruction, then go to Step 9.
No | Go to next step.
4 | VERIFY THAT DUCT IN DASHBOARD IS INSTALLED • Is duct in dashboard properly installed? | Yes | Inspect duct for clogging, deformity and air leakage, then go to Step 9.
No | Install duct securely in the proper position, then go to Step 9.
5 | INSPECT TO SEE WHETHER MALFUNCTION IS IN HEAT MODE OR DEFROSTER MODE • Does air blow out when in HEAT mode? | Yes | Go to next step.
No | Inspect vent for clogging, then go to Step 9.
6 | INSPECT DEFROSTER MODE • Does air blow out when in DEFROSTER mode? | Yes | Operation is normal. Recheck malfunction symptoms.
No | Go to next step.
7 | INSPECT VENT • Is vent clogged? | Yes | Remove obstruction, then go to Step 9.
No | Go to next step.
8 | VERIFY THAT DEFROSTER DUCT IS INSTALLED • Is defroster duct properly installed? | Yes | Inspect duct for clogging, deformity, and air leakage, then go to next step.
No | Install duct securely in proper position, then go to next step.
9 | CONFIRM THAT MALFUNCTION SYMPTOMS DO 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 malfunction recurs.