Help required: How to print temp tower

[DavidR8]

I'm trying to print a temp tower and for some reason the temp isn't changing at the specified points.
I checked the gcode and the M104 commands are there with the required temp.
Is there some other voodoo required to make this work?

 

[Doggggboy]

Chep on Youtube usually has some good info on stuff like this.

 

[DavidR8]

I think I found the problem... I was using M104 $220 instead of M104 S220
DOH!