SSANGYONG Korando 2012 Manual page 336

15-38
c. Operation process
The ceramic PTC has a feature that the resistance goes up very high at a certain temperature.
There are three circuits in PTC heater. Only one circuit is connected when PTC1 relay is ON, and
two circuits are connected when PTC2 relay is ON.
Operation process: reaches at a certain temperature→high resistance→low current→less heat
radiation→temperature down→high resistance→high current→temperature up