Hyundai Venue: 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. Remove the heater unit assembly. (Refer to Heater - "Heater Unit") 2...

PTC Heater. Repair procedures

Inspection Operating Logic Test (Manual only) Inspect the PTC operation by confirmation logic as follows; 1. Entering (1) Set the Floor mode and maximum heating position...

Other information:

Hyundai Venue (QX) (2020-2023) Service Manual: Repair procedures

Removal    • Frequent inhalation of brake pad dust, regardless of material composition, could be hazardous to your health. • Avoid breathing dust particles...

Hyundai Venue (QX) (2020-2023) Service Manual: General information

General Service Information Protection of the Vehicle Always be sure to cover fenders, seats, and floor areas prior to beginning work.    • The support rod must be inserted into the hole near the edge of the hood whenever you inspect the engine compartment to prevent the hood from falling and causing possible injury...