Weber grill will not heat up, reaches 200F and no

Also, it has to shut down the same way every time you use your grill.

Here is a Tip to fix a grill that not getting hot:
1. Turn the gas valve knob off. then close LP tank valve knob.
2. Unscrew the plastic hose coupling knob from the LP tank. You may hear a slight "hissing" sound as pressure is released this is normal.
3.Wait a minute then screw the coupling knob back on to LP Tank.
4.With lid open.slowly open LP tank valve.
5.Relight the grill the proper way by turning gas valve knob to ON position while turning the igniter knob at the same time.
6.After you are sure the grill is lit preheat the grill for 30 minutes.

This was called purging the line or releasing the air out of the line.

Another thing your orifice could be clogged with spiders or dirt. If it is LP gas check to make sure your hose is not kinked.

This happened to me on my Weber Grill. If you turn the gas on too fast it has a safety feature to prevent it from getting too much gas at once. Turn off all of the valves and let it sit for a few minutes. Then slowly turn the gas on at the tank, and light as directed. See if this works.