Tempstar Air Handler FXM4X4800A1 Installed 09/2010.
New Tempstar Heat Pump installed at the same time.
A/C system controlled by Carrier Comfort Zone 4 Zone System installed in 1992.
When AC comes on the Air Handler Blower runs for about 20 seconds then stops for 3seconds then runs for about 20 seconds. This happens the entire time the system is running.
Otherwise the system is running fine & the house is cool. All three filters have been replaced.