volcano

Hi guys, I was just reading a paper on inhaled cannabis and concerns for the immunodeficient host. http://www.mascc.org/assets/Pain_Center/2015_March/march2015-11.pdf I have been thinking about this myself as my wife is undergoing cancer treatment (lymphoma) and here in Brazil marijuana is...

Hoping someone with one of these may be able to help. I have just bought a volcano but have got it home and although it heats up the fan does not come on at all. the green light on the button comes on the nothing at all form the fan. Is there something i am doing wrong?