I've had similar problems with my couple AcuRites. I've got a snake room in my basement so naturally I need heat it (with an oil filled radiator which drastically dries the room out). For a while I never even noticed it was as dry as it was because my ROOM AcuRite was saying 52%. All of my snakes went off feed for months and besides the humidity, everything else was spot on. So I decided to try one of my other AcuRites which had fresh batteries and boom, the humidity reading was LOW (which signifies under 20%!!!!)...
So yea... the AcuRites can definitely have some bogus readouts...
Reply With Quote