I just got a Team Checkpoint Soldering Station but I'm not sure if it is working correctly. According to the directions the red light is supposed to blink when it reaches the correct temperature. Mine will only blink if I have the temp all the way up. If I set the temp at 650 or 700 degrees the light goes from a bright red to a dull red light but it doesn't blink. It will blink at 800 degrees and above. Is this normal?

Thanks.