When I first bought my turkey fryer in 2006, it behaved strangely. No matter how the regulator was set and how open the propane tank valve was, the flame was always very weak. After "fiddling" with the thing (basically turning the regulator up and down a lot), I got it to come up to full strength, which sounds to me not unlike a quiet jet engine.
Anyway, it worked fine for quite a few brews. I still had the occasional issue with the weak flame, but some fiddling always solved it eventually.
I then went on a one-year brewing hiatus, and then again for the better part of a year. In short, my turkey fryer has been used once in roughly 24 months, and I'm wondering if the disuse and cold storage temperatures could have damaged it. I don't want to hook it up and blow my head off.