Hyundai Elantra AD Quiz
Heating, Ventilation, and Air Conditioning

PTC Heater Repair Procedures

In this manual: Heating, Ventilation, and Air Conditioning
General Information — 9Engine Mechanical System — 84Engine Electrical System — 60Emission Control System — 24Engine Control System/Fuel System — 90Automatic Transmission — 92Drive Shaft and Axle — 20Suspension System — 31Steering — 20Restraints — 50Brake System — 63Body (Interior and Exterior) — 214Body Electrical System — 221Heating, Ventilation, and Air Conditioning — 71
15steps
~90min
4/5difficulty
Done 0 of 15

Inspection

Operation Logic Check (Manual Only). Check PTC operation using the confirmation logic as follows.
  1. Input
    1. Set the floor mode and the maximum heat position.
    2. Turn the blower switch off.
    3. Press the intake (recirculation) button 5 or more times.
    4. The intake indicator and A/C button blink continuously at 0.5-second intervals.
    5. Confirm PTC operation by turning on the blower switch.
    6. Each PTC relay activates at 3-second intervals.
    7. The logic test is automatically cancelled after 30 seconds. It can also be cancelled as follows.
      A. Select the A/C or intake (recirculation) switch.
      B. Ignition switch OFF.
  2. Cancel
    A. Select the A/C or intake (recirculation) switch.
    B. Turn the ignition off.
    C. The test is automatically cancelled after 30 seconds.
  3. If the PTC does not operate, replace it with a known good PTC heater and check operation. If the problem is resolved, replace the PTC heater.
  4. Start the engine.
  5. Check the current in the wiring using a clamp-type multimeter.
    Pattern Current (A)
    PTC 1 ON 0,1 ~ 33
    PTC 2 ON 0,1 ~ 33
    PTC 3 ON 0,1 ~ 33
    General 0,1 ~ 100
  6. If the current does not meet the specification, check the related wiring.
  7. Turn the ignition off.
  8. Disconnect the PTC heater connector.
  9. Measure the resistance between terminals 1, 2, 3 of the PTC heater and the ground line.

    Resistance: 0.3 ~ 1.5 Ω

    A. PTC 1
    B. PTC 2
    C. PTC 3
  10. If the measured resistance does not meet the specification, replace the PTC heater with a new one.
Operation Test. This test must be performed with the PTC on. Resistance Test

Replacement

  1. Disconnect the negative (-) battery terminal.
  2. Remove the floor console side cover. (Refer to Body - "Floor Console Assembly")
  3. Disconnect the PTC heater connector (A).
  4. Remove the PTC heater core (A) after loosening the PTC heater mounting screws.
  5. To install, reverse the removal procedure.

Test yourself

A quick Hyundai Elantra AD quiz: every answer comes with an explanation and a link to the manual page.