Why is my steam wand not frothing the milk?

Please try the following which should rectify the problem:- Ensure the steam function has been selected on the control panel. - Ensure the steam dial is fully open.- Check the milk nozzle(s) are completely clean and free of milk debris. (There will be either one or two removable milk nozzles depending on your machine). These should always be cleaned after each milk delivery session.- Check both o-rings are intact on the milk frother.