I'm certainly no chondro expert, but I give mine much warmer hotspots than 83/84. From what I've read, a high humidity and lower temps can cause some RI symptoms in these guys.

If he were mine, I'd push the hot spot up to about 89/90, check his nostrils for any left over shed and collect the next fecal for the vet to check. I wouldnt stress the snake with a vet visit at this point. I'd leave him alone and just check him every day and keep good notes.
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Julie
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