New growth can happen even if the orchid is not getting enough light. Try giving it more light. Slowly moving it into higher light levels so as to not burn it is the best way to do this. 9 times out of 10 when something is not blooming, but is growing well, it is a light issue. I will let someone else tell you if it needs a cool down, but I do not believe this to be the case. And finally, maybe it is not mature enough to bloom? Sometimes, depending on the species, an orchid must be a few years old before it can actually bloom. Best of luck.