Hyundai Santa Fe: 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 with an interval of 15 seconds.

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...

PTC Heater (Diesel only). Repair procedures

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

Other information:

Hyundai Santa Fe (TM) 2019-2024 Owner's Manual: Engine oil

Checking the engine oil level Gasoline engine 1. Follow all of the oil manufacturer’s precautions. 2. Be sure the vehicle is on the level ground in P (Park) with the parking brake set and the wheels blocked. 3. Turn the engine on and allow the engine to reach normal operating temperature...

Hyundai Santa Fe (TM) 2019-2024 Owner's Manual: Auto stop

When ISG is on the engine will be stopped automatically when both of the following occurs: 1. Vehicle speed decreases to 0 mph (0 km/h) full stop condition. 2. Brake pedal is depressed and gear is in D (Drive) or N (Neutral). The Auto Stop () indicator illuminates in green on the instrument cluster, when the engine stops...