Air Supply refers to air entering your home from the air handler.
Air Return refers to air exiting the home and traveling to your air handler.
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Updated 8.1.22
To check double capacitor. Tabs are:
H for Hermetic or your compressor
F for fan
C for common
FAN MOTOR REPLACEMENT
FAN AND LOCK W BOLT IS ONE PIECE
1. PENETRATING OIL SHAFT
2. USE SOCKET TO DISLODGE
3. USE PULLER TO PULL FAN OFF SHAFT
4. CLEAN FAN BLADES WHEN HOME VACANT