Kia Sportage: Heater / PTC Heater Description and operation

The PTC (Positive Temperature Coefficient) heater is installed at the exit or the backside of 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 diesel engine. The electric heater heats up the interior by directly heating the air that passes through the heater. The name itself implies that the element has a proportional resistance change sensitive to temperature.

Operation Principle

ECM outputs a PTC ON signal and operates PTC relay 1. Then heater controller operates PTC relay 2 and PTC relay 3 with an interval of 15 seconds.

However, PTC relay 3 can be operated while battery voltage is above 12.4V.

Operating Condition

PTC heater operates according to the following conditions;

Heater Core Repair procedures

Replacement 1. Disconnect the negative (-) battery terminal. 2. Recover the refrigerant with a recovery/recycling/charging station. ...

PTC Heater Repair procedures

Inspection Operating Logic Test (Manual only) Inspect the PTC operation by confirmation logic as follows; 1. Entering (1) Se ...

Other information:

Kia Sportage QL (2015-2026) Service Manual: Water pump Components and components location

Components 1. Water inlet pipe 2. Water inlet pipe O-ring 3. Water pump housing 4. Water pump housing gasket 5. Water pump gasket 6. Water pump 7. Water pump pulley ...

Kia Sportage QL (2015-2026) Owners Manual: Detecting area

The Smart Power Liftgate operates with a welcome alert if the smart key is detected within 20 ~ 40 inches (50 ~ 100 cm) from the liftgate. The alert stops once the smart key is positioned outside the detecting area during the Detect and Alert stage. ✽ NOTICE The Smart Power Lif ...