if...elseif error while entering values again and again

While in this program i have to enter the temperature again and again in a loop....while i enter the temperature once it shows the correct display but when i enter the temperature again the program terminates itself please help. The code is:

    **import java.util.Scanner;
    public class CheckTemperature
    {
        public static void main(String [] args) 
        {
            final double TEMPERATURE = 102.5;
            double thermostat;

            Scanner keyboard = new Scanner(System.in);
            System.out.println("Enter the substance's temperature: ");
            thermostat = keyboard.nextDouble();

            if(thermostat > TEMPERATURE)
            {
                System.out.print("The temperature is too high. ");
                System.out.print("Turn down the thermostat. ");
                System.out.println("Wait for 5 minutes and check the thermostat again. "); 
                System.out.println("Enter the thermostat here: ");
                thermostat = keyboard.nextDouble();

            }
            else if(thermostat < TEMPERATURE)
            {
                System.out.println("The temperature is low.");
                System.out.println("Turn up the thermostat.");
                System.out.println("Check for 5 minutes and check again.");
                System.out.println("Enter the thermostat here: ");
                thermostat = keyboard.nextDouble();

            }

            else if(thermostat == TEMPERATURE) {

                System.out.println("The temperature is acceptable. Check again in 15 minutes.");
                System.out.println("Enter the thermostat here: ");
                thermostat = keyboard.nextDouble();
            }

            else{
                System.out.println("Enter the correct temperature value ");
                System.out.println("Enter the thermostat here: ");
                thermostat = keyboard.nextDouble();
            }


        }

    }**