I didn't let my ganache set long enough before covering my cake and now I am wondering if I can put fondant over it still?  

The cake has been in the fridge overnight also due to hot humid weather. 

Did I wreck it completely or is it saveable?  It is carved out to be an x box cake so the shape doesn't make sense without the fondant. 

I only have about 4 hours after work to make a new one if need be.

Please help!!

Was it too soft?  Did it set up after you used it on the cake, since you say its been in the fridge?  I really can't answer your question.  I've worked with ganache but haven't had that problem.  Just the same I would be really scared to try.  Worried that the fondant would tear off as the ganache softens.

Sorry your having so much trouble.

I let the cake sit on the counter for while with a small fan blowing on it before putting it in the fridge.  It did thicken quite a bit once cool but I was told to let my cakes return to room temp before putting on fondant, so I am scared the heat will make it soft again   Can I put fondant on a cake straight out of the fridge?

I do but when they have buttercream, not ganache.  They I let them sit out.  Try it and see how soft it gets.  If too soft you won't be able to put fondant on it.

Can you pull off the ganache and put a new batch on the cake?  I've read on other threads people giving advice to do that.