Not very happy!

[Baker]

So im reaching out to the biocube 8 owners and the nanocube 28 hqi owners. I purchased both of these tanks off kijiji and finally got around to setting them up. I have been taking temps from both tanks. I turn the lights on in the morning before I go to work and when I get home the temp in the BC8 is 85 and the NChqi is 84. I have actually unplugged the heater in the Bc8 and temps are still getting up to 85, so i know its not a faulty heater. I cleaned the fans but i dont noticed much of anything coming out. Are these known for over heating? The temp in the apartment is 70 so i know its not that. Im at a loss. Do I need to buy new fans for both of them? I dont see why they would sell something that is reef compatable if you cant even get the temps within reef safe. Someone please help a brother out.