Kia Carens: Heater / PTC Heater (Diesel only) Description and operation

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 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 the 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 :

Evaporator Core Repair procedures

Replacement 1. Disconnect the negative (-) battery terminal. 2. Remove the heater and blower assembly. (Refer to Heater -" ...

PTC Heater (Diesel only) Repair procedures

Inspection Operating Logic Test (Manual only) Inspect the PTC operation with the confirmation logic below : 1. Entering (1) ...

Other information:

Kia Carens RP (2013-2018) Owners Manual: Engine coolant

The high-pressure cooling system has a reservoir filled with year-round antifreeze coolant. The reservoir is filled at the factory. Check the antifreeze protection and coolant concentration level at least once a year, at the beginning of the winter season, and before traveling to a colder climate ...

Kia Carens RP (2013-2018) Owners Manual: Auto stop

To stop the engine in idle stop mode With manual transaxle 1. Decrease the vehicle speed to less than 5 km/h (3 mph). 2. Shift into N (Neutral) position. 3. Release the clutch pedal. With dual clutch transmission 1. Decrease the vehicle speed to 0 km/h. 2. Shift into D (Drive) or N (Neutral) positi ...