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 Owners Manual: Maintenance when trailer towing
Your vehicle will need service more often when you regularly pull a trailer. Important items to pay particular attention to include engine oil, automatic transaxle fluid, axle lubricant and cooling system fluid. Brake condition is another important item to frequently check. Each item i ...

Kia Cee'd Owners Manual: Air intake control
The air intake control is used to select the outside (fresh) air position or recirculated air position. To change the air intake control position, press the control button. Recirculated air position With the recirculated air position selected, air from the passenger compartment wi ...