First point - they can't fix your unit but they reconditioned someone elses? The lyin' feckers! I'd assume the recon is simply returned stock, probably very little wrong with it.
Second point - if you liked the old unit and found it handy to use, another one will do the same job and fit your console bracket or cutout (which is good
Third point - The rocker switch will work for now (if you have a spare one) but factor cost and hassle if you don't. If the problem worsens that will negate any effort taken in that direction.
Soooo, personally, I'd take the Recon unit and fleabay the old unit with "the safely feature that prevents kids turning it off!