Insufficient Heating

INSUFFICIENT HEATING

Description

- Insufficient heating
- No warm air comes out. (Air flow volume is normal.)


Diagnosis Procedure

NOTE:
Perform the self-diagnosis with CONSULT before performing the diagnosis by symptom. Perform the diagnosis by DTC if DTC is detected.

1. CHECK HEATING SYSTEM

1.Check the heater level and check for leakage. Refer to "Inspection" Inspection.
2.Check the water flow sounds on coolant. Refer to "Draining and Refilling" Draining And Refilling.
Is the check result normal?
YES- GO TO 2.
NO- Refill the heater fluid and repair or replace the parts according to the inspection results.

2. CHECK HEATER PUMP

Check the heater pump operation. Refer to "Component Function Check" Heater Pump.
Is the check result normal?
YES- GO TO 3.
NO- Repair or replace malfunctioning part according to diagnosis result.

3. CHECK HEATER HOSE INSTALLATION CONDITION

Check the heater hose installation condition visually (for twist, crush, etc.).
Is the check result normal?
YES- GO TO 4.
NO- Repair or replace malfunctioning part according to diagnosis result.

4. CHECK HEATER CORE

1.Check the temperature of inlet hose and outlet hose of heater core.
2.Check that the inlet side of heater core is hot and the outlet side is slightly lower than/almost equal to the inlet side.

CAUTION:
The temperature inspection should be performed after a short time because the engine coolant temperature is too hot.
Is the check result normal?
YES- GO TO 5.
NO- Replace the heater core.

5. CHECK FOR AIR LEAKAGE FROM DUCT

Check duct and nozzle, etc. of A/C system for air leakage.
Is the check result normal?
YES- GO TO 6.
NO- Repair or replace malfunctioning part according to diagnosis result.

6. CHECK SETTING OF DIFFERENCE BETWEEN SET TEMPERATURE AND CONTROL TEMPERATURE

With CONSULT
1.Using CONSULT, check the setting of "TEMP SET CORRECT" on "WORK SUPPORT" of "HVAC". Refer to "Temperature Setting Trimmer" Temperature Setting Trimmer.
2.Check that the difference between set temperature and control temperature is set to " direction".
NOTE:
The control temperature can be set with a setting difference between the set temperature and control temperature.
3.Change the set temperature correction value to "0".
Are the symptoms solved?
YES- Perform the setting separately if necessary. Inspection End.
NO- Replace A/C auto amp. Refer to "Removal and Installation" Service and Repair.