I'm having an issue with my central AC. It cannot seem to get the temp down to where I would like it - 71 degrees. Last night when I got home from work the temp in the house was 76 (AC was turned off all day). I set it to 71 and it ran continuously for 6+ hours before it could get the temp down to 71. This has never been an issue in the past. It could always get the temp down to where I would like it in a short period of time and then after that it would cycle on and off to maintain. There is cold air coming out of the vents but I'm not sure how cold it chould be as I never really paid attention to this before.
The AC is a Rheenm and is 3 years old. I checked the cold air returns and they are clean and the furnace filter was replaced last night after the unit was running so long even the the old one looked ok. I'm about to call the HVAC people but just wondering if there is anything else I can check?