BBQ grill not very hot, we don't get char taste..

We have a relatively new bbq grill (2 yrs), propane, I don't know how many btu's. We don't get any flare up or any char taste. Stuff just cooks hohum. Hubs has Cleaned it, is this as good as it gets? Can I add charcoal for a better cooked flavor? It is more on the cheap side, so that is what I am thinking is the problem. @KMS? Anyone? Any suggestions on how to get a better cooked product from it? I have oiled the meats with olive oil hoping to get more char, not working so well.
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