It's probably out of gas thats all?, There made so that when the gas is low they wont come on at all so as to not damage anything. I had the same problem with my VS, nothing would work or engage etc & the fan blew hot, Check to see if there is any gas still inthe system by quickly pushing on the valve like a tire, and if nothing happens I would say Gas is you problem...
The aircon system will not come on at all if there is not enough gas, it's a safety shut down thing, and as sooon as i put the gas in, the air con switch worked, the compressor engaged, & 30 seconds later it was fantastic!!!, [Like you, I thought I was going to be up for heaps to begin with but all it ended up costing me $50 for the gas...
Cheer's
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