ac was blowing cold now it blows out hot air what could it be?it s full of freon?
If the aluminum tube going to from the compressor to the firewall is cold with the engine running and A/C on, then there is a problem with the hot/cold blend door in the ductingThey are controlled by vacuum or a cable.
I helped build a school last year and I can say that the best thing to do is put new fiberglass in there and take out the old onesPlus, to save on heating bills, make sure all the gaps between the windows and doors are sealed; if not then caulk them inThose little cracks may not be visible to us, but heat will escape through themWell, good luck with the insulating!
If the old insulation is dry and not damaged in any other way, leave itRoll the new stuff over itAs for the walls, it is not likely they are open at the topyou would have to drill holes to feed the insulation down into the wallit is possible if you use the small BB shaped foamDo it before you insulate the attic so you are not crushing the new stuffYou can also save a lot by using the plastic sheeting you stretch across windows and shrink with a hairdryerThose provide a barrier between the house and the cold glassCheaper than new windows and much easier/ fasterThe electrical outlets on outside walls leak a lot of cold airBuy the flat foam sheets that go behind the coverplate, they make a BIG difference.
insulation is rated in R-Valuethe norm is: floors R-19 ( 6 thick) walls R-13 ( 3 1/2 thick) ceilings R-30 (9 thick) if u buy more for the attic, roll it out opposite way the other is rolled out.across the other insulation.but only if the old insulation is equal or above the ceiling joistit has been my experience that u can contract the job done cheaper than u can go buy all the material! calla insulation company for a estimatelcgencontractor
