Originally Posted by chucknviv
I have a solid piece of styrofoam inside all my a/c vents, is this normal? I have my a/c set on automatic and the fan runs on low or medium, but never shuts off, should it?
Styrofoam is what the ducts are made of they bore 4" holes through it, so that is normal, Your unit should cycle but could also depend on the temp setting or how hot and much heat gain your getting. You should get atleast a 17 degree drop from the outlet air to the return air, measure it with a thermometer. other then that you could below on your Freon charge.....
PS: do you have a analog stat or digital?