Kia Cee'd: Heater / PTC Heater (Diesel Engine) 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 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 :

 

Mode Control Actuator Repair procedures

Inspection 1. Turn the ignition switch OFF. 2. Disconnect the mode control actuator connector. 3. Verify ...

PTC Heater (Diesel Engine) Repair procedures

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

Other information:

Kia Cee'd JD Owners Manual: Heating
1. Set the mode to the position. 2. Set the air intake control to the outside (fresh) air position. 3. Set the temperature control to the desired position. 4. Set the fan speed control to the desired speed. 5. If dehumidified heating is desired, turn the air conditioning system on. • ...

Kia Cee'd JD Owners Manual: OFF
With manual transaxle To turn off the engine (START/RUN position) or vehicle power (ON position), stop the vehicle then press the engine start/stop button. With automatic transaxle/DCT* To turn off the engine (START/RUN position) or vehicle power (ON position), press the engine start/ ...