It's a air cleaner. I want to put a timer inside. The timer has four choices:1,2,3,4 hours to choose from. The problem I face is that I can't use IR remote to start the timer. Thanks for asking.

I want to use IR remote to start the timer. Let the device work for 1 hour. After 1 hour, the device stop working. My question is that by using button program , my timer can work but using IR remote program, my timer wont work.
Please help, I try so many times, but just cant figure it out.

please help:

I want to press IR button to start the timer of a project. Let the project start working for 1 hour then stop. But the program I write below can not do what I want it to do . I press the IR button but the timer do nothig. Is there something wrong?

unsigned long HR; 
  unsigned long MILLIS;         
  const long timingH1 = 5000;       
  const byte  sw = 13;              
  #include <IRremote.h>
  const byte RECV_PIN = 3;            
  IRrecv irrecv(RECV_PIN);              
  decode_results results;              
void setup(){
  HR = millis();                      
  irrecv.enableIRIn(); 
  pinMode(sw,OUTPUT);               
  pinMode(sw,HIGH);                
  digitalWrite(sw,LOW);
  Serial.begin(9600); 
  }
void loop() {
   if (irrecv.decode(&results)) {    
        if (results.value == 16724175){                                                                                  
             MILLIS = millis();
              Serial.print("HR:");
               Serial.println(HR);
                Serial.print("MILLIS:");
                 Serial.println(MILLIS);               
               if (MILLIS - HR  >= timingH1){  
                   HR = MILLIS; 
                    digitalWrite(sw,HIGH);
                 }}
       irrecv.resume();   
       }    
}