Hyundai Ioniq: Heater / PTC Heater. Repair procedures
Operating Logic Test (Manual only)
Inspect the PTC operation by confirmation logic as follows.
| 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) | \Indicators of intake and A/C button are continuously flashed with an interval of 0.5 seconds. |
| (5) | Confirm the PTC operation by turn on the blower switch. |
| (6) | Each PTC relay is operated with an interval of 3 seconds. |
| (7) | The logic test will be automatically cancelled after 30 seconds. In addition, it can be cancelled by followings. | •
| Select A/C or intake (recirculation) switch |
|
|
| 2. | Cancellation | •
| Select A/C or intake (recirculation) switch. |
| •
| Turn the ignition switch OFF. |
| •
| The test is cancelled automatically after 30 seconds. |
|
| 3. | If the PTC is not operated, 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 wiring with a clamp multi tester.
Pattern
| Current (A)
| PTC 1 ON
| 0.1 - 33
| PTC 2 ON
| 0.1 - 33
| PTC 3 ON
| 0.1 - 33
| Total
| 0.1 - 100
|
|
| 3. | If the current is not specification, inspect related wiring. |
Resistance Test
| 1. | Turn the ignition switch OFF. |
| 2. | Disconnect the PTC heater connector. |
| 3. | Measure the resistance between terminal 1, 2, 3 of PTC heater and ground line. 
|
| 4. | If the measured resistance is not specification, replace the PTC heater with new one. |
| 1. | Disconnect the negative (-) battery terminal. |
| 2. | Remove the floor console side cover. (Refer to Body - "Floor Console Assembly") |
| 3. | Disconnect the duct sensor connector (A). |
| 4. | Remove the driver's side shower duct (B) after loosening the screw. 
|
| 5. | Disconnect the PTC heater connector (A). 
|
| 6. | Remove the PTC heater core (A) after loosening the PTC heater mounting screws. 
|
| 7. | To install, reverse the removal procedure. |
DescriptionThe 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 heating device that supplements deficiency of interior heat source in highly effective hybrid engine...
Replacement1.Disconnect the negative (-) battery terminal. 2.Remove the heater and blower assembly.(Refer to Heater - "Heater Unit") 3.Remove the evaporator core cover (A) after loosening the mounting screws...
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Categories
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4. Engine coolant reservoir
5. Inverter coolant reservoir
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PTC Heater. Description and operation
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