NO.1 INSUFFICIENT AIR (OR NO AIR) BLOWN FROM VENTS [MANUAL AIR CONDITIONER]

id0703c2800400

1

Insufficient air (or no air) blown from vents

DESCRIPTION

•  Problem with each vent and/or duct.

•  Airflow mode does not change.

POSSIBLE CAUSE

•  Malfunction in airflow mode wire

•  Malfunction in VENT mode system

•  Malfunction in HEAT mode system

•  Malfunction in DEFROSTER mode system

•  Malfunction in next vent or duct (clogging, deformation, air leakage, improper operation)

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT A/C UNIT AIRFLOW MODE SYSTEM • Inspect the A/C unit and/or climate control unit airflow mode links, air airflow mode cranks, air airflow mode rods, and wire clamp. ― Is there grease on links and cranks? ― Are links, cranks, and rods securely installed in their proper positions? ― Is wire clamp free of deformation? • Are the above items normal?	Yes	Go to the next step.
1		No	Apply grease or airflow mode the links, cranks, and rods securely in their proper positions, repair or replace the airflow mode wire clamp, then go to Step 9.
2	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 5.
2		No	Go to the next step.
3	INSPECT VENT • Is the vent clogged?	Yes	Remove obstruction, then go to Step 9.
3	INSPECT VENT • Is the vent clogged?	No	Go to the next step.
4	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 9.
4		No	Install the 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 the HEAT mode?	Yes	Go to the next step.
5		No	Inspect the vent for clogging, then go to Step 9.
6	INSPECT DEFROSTER MODE • Does air blow out when in the DEFROSTER mode?	Yes	Operation is normal. Recheck malfunction symptoms.
6		No	Go to the next step.
7	INSPECT VENT • Is the vent clogged?	Yes	Remove obstruction, then go to Step 9.
7	INSPECT VENT • Is the vent clogged?	No	Go to the next step.
8	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.
8		No	Install the duct securely in proper position, then go to the next step.
9	CONFIRM THAT MALFUNCTION SYMPTOM DOES NOT RECUR AFTER REPAIR • Does air blow out?	Yes	Troubleshooting completed. Explain repairs to customer.
9		No	Recheck malfunction symptoms, then repeat from Step 1 if the malfunction recurs.

1	Insufficient air (or no air) blown from vents
DESCRIPTION	• Problem with each vent and/or duct. • Airflow mode does not change.
POSSIBLE CAUSE	• Malfunction in airflow mode wire • Malfunction in VENT mode system • Malfunction in HEAT mode system • Malfunction in DEFROSTER mode system • Malfunction in next vent or duct (clogging, deformation, air leakage, improper operation)