Yes that is quite likely, most asking for help with ambient temps have more issues than a couple of degrees however. Suggesting RHP heats are is just not true. It is super easy to prove check the temp of the face of the panel when it is on and ask your self if it was heating air it should be with in a few degrees of this right? Mine runs at 100º to 110º on the face if it heated the air this would quickly over heat the enclosure.