OK I have tries almost every thing here’s my problem:
I live in Central Valley California where the temperature is typically 96 plus degrees throughout the late spring, summer and early fall. At time the temperature is 110.
The AC unit works fine; it blows cool air except when it’s really hot.
I put in some insulation (blow in) a month ago because there were parts of the house that didn’t have any insulation.
The furnace/blower unit is located in the attic (I know that sucks). The compressor is in the backyard exposed to the Sun all day. I gave it some shade without disrupting the airflow. I was looking at the furnace/blower unit and noticed that the metal box above the unit where the main ducting is connected is not insulated (should it be?) I would think that metal box gets pretty hot in the attic and the supposedly cool air is getting pretty warm before being delivered to the house.
My questions are should that metal box above the unit be insulated???
How deep should the blow-in insulation be?
Is a whole house fan a good idea to displace the hot air in the attic?
Any advice would be appreciated.