Kia Cee'd: Heater / PTC Heater (Gasoline Engine) Repair procedures

Kia Cee'd JD Service Manual / Heating,Ventilation, Air Conditioning / Heater / PTC Heater (Gasoline Engine) Repair procedures

Inspection
Operating Logic Test (Manual only)
Inspect the PTC operation with the confirmation logic below :
1.
Entering
(1)
Set the Floor mode and maximum heating position.
(2)
Turn off the blower switch.
(3)
Press the intake(recirculation) button 5 times or more.
(4)
The intake and A/C button indicator will continuously flash with an interval of 0.5 seconds.
(5)
Confirm the PTC operation by turning on the blower switch.
(6)
Each PTC relay is operated with an interval of 3 seconds.
(7)
The logic test will automatically cancelled after 30 seconds.
In addition, it can be cancelled by doing the followings :
Select A/C or intake (recirculation) switch
Ignition switch OFF
2.
Cancellation
Select A/C or intake (recirculation) switch.
Turn the ignition switch OFF.
The test cancels automatically after 30 seconds.
3.
If the PTC does not operate, substitute with a known-good PTC heater and check for proper operation.
If the problem is corrected, replace the PTC heater.
Operating Test
This test should be performed in the PTC ON conditions.
1.
Run the engine.
2.
Check the current on the wiring with a clamp multi tester.
 
Pattern
Current (A)
PTC ON
12 ~ 32
Total
12 ~ 32

3.
If the current is not within specification, inspect the related wiring.
Resistance Test
1.
Turn the ignition switch OFF.
2.
Disconnect the PTC heater connector.
3.
Measure the resistance between terminal 1 and PTC ON (+) of PTC heater and ground line.
Resistance : 0.3 ~ 1.2Ω

4.
If the measured resistance is not within specification, replace the PTC heater with a new one.
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel")
3.
Remove the driver side shower duct (A) after loosening the screw.

4.
Disconnect the PTC heater connector (A).

5.
Remove the PTC heater core (A) after loosening the PTC heater mounting screws.

6.
Install in the reverse order of removal.
PTC Heater (Gasoline Engine) Description and operation
Descriptionddd The PTC (Positive Temperature Coefficient) heater is installed at the exit or the backside of the heater core. The PTC heater is an electric heater using a PTC e ...

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