Insufficient Heating

INSUFFICIENT HEATING





Description

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




Diagnosis Procedure

CAUTION:
Perform the self-diagnosis with CONSULT-III before performing symptom diagnosis. If any malfunction result or DTC is detected, perform the corresponding diagnosis.
1.CHECK COOLING SYSTEM
1. Check the engine coolant level and check for leakage. Inspection.
2. Check the radiator cap. Service and Repair.
3. Check the water flow sounds of the engine coolant. Refilling Engine Coolant.
Is the inspection result normal?
YES - GO TO 2.
NO - Refill the engine coolant and repair or replace the parts depending on the inspection results.
2.CHECK HEATER HOSE
Check the installation of heater hose by visually or touching.
Is the inspection result normal?
YES - GO TO 3.
NO - Repair or replace parts depending on the inspection results.
3.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:
Always perform the temperature inspection in a short period of time because the engine coolant temperature is very hot.
Is the inspection result normal?
YES - GO TO 4.
NO - Replace the heater core. Manual Air Conditioner Exploded View.
4.CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of the air conditioner system for air leakage.
Is the inspection result normal?
YES - Check the air mix door cable installation and air mix door operation.
NO - Repair or replace parts depending on the inspection results.