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Kia Forte: PTC Heater Inspection - Heater - Heating,Ventilation, Air Conditioning - Kia Forte TD 2014-2018 Service ManualKia Forte: PTC Heater Inspection

Second generation YD (2014-2018) / Kia Forte TD 2014-2018 Service Manual / Heating,Ventilation, Air Conditioning / Heater / PTC Heater 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 continually 5 seconds 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 after 3 seconds.
(6)
The logic test will automatically cancelled after 30 seconds.
In addition, it can be cancelled by doing the followings :
A.
Select A/C or intake (recirculation) switch
B.
Ignition switch OFF
2.
Cancellation
A.
Select A/C or intake (recirculation) switch.
B.
Turn the ignition switch OFF.
C.
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.
PTC Heater Description
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 element as an auxiliary hea ...

PTC Heater Replacement
1. Disconnect the negative (-) battery terminal. 2. Remove the crash pad lower panel. (Refer to Body - "Crash Pad Lower Panel" ...

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