Kia Forte: 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
|
|
|
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.
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.

|
4. |
If the measured resistance is not within specification, replace
the PTC heater with a new one.
|
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 ...
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel" ...
See also:
Auto Light Sensor Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the auto light sensor (A) from crash pad upper side by
using screw (-) driver.
...
Rear Wheel House Trim Component Location
(4Door)
1. Rear wheel house trim
(5Door)
1. Rear wheel house trim
...
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 ...