Hyundai Elantra AD (2016-2020) Service Manual: PTC Heater Description and Operation
Description
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
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Hyundai Elantra AD (2016-2020) Service Manual: Mic Repair procedures
Inspection
1.
Disconnector the negative (-) battery terminal.
2.
Remove the overhead console lamp.
(Refer to Body Electrical System - "Overhead Console Lamp")
3.
Remove the overhead console cover after loosening the screws.
4.
Check the continuity of between terminals. ...