I have a Bryant AC/Furnace unit. My house is 10 years old. A heat wave hit this weekend & temps got up to 95°F outside. I had my thermostat set to 75°, and it ran all day. The thermostat never dropped below 80° during the day & eventually cooled down towards the evening. How can I tell if it's a problem with my AC or with the insulation in the house? The attic has insulation "blown" in it, and from what I can tell, was done recently before we bought the house 5 years ago.
Does the "blown" insulation have to be re-blown every so often? Or is it more likely a problem with the AC unit? I've never had it serviced since I bought the house, but I have changed the air filters monthly.
Something else I remembered: my house is bi-level. I keep the downstairs vents closed because if they're all open, it gets pretty cold down there. With them closed, it's maybe a little warmer than upstairs. We're upstairs most of the time anyway. Would that affect anything?