How do I save IR codes from my LG Air Conditioner remote and replay them?

Question

I am currently using the following code

#include <IRremote.h>

int RECV_PIN = 11;
IRrecv irrecv(RECV_PIN);
decode_results results;

void setup()
{
 Serial.begin(9600);
 irrecv.enableIRIn(); // Start the receiver
}

void loop()
{
 if (irrecv.decode(&results))
  {
   Serial.println(results.value, HEX);
   irrecv.resume(); // Receive the next value
  }
 }

The Serial Monitor is always returning "FFFFFFFF" no matter which button I press. So I am unable to replicate the signal.

Seems that the IR library doesn't support my LG remote.

How do I save and replicate the signal in this case?