2001 Ford Explorer AC Not cooling enough

May be, but you could also have a debris build up on your evaporator core. Causing the air not to blow suffinciently across the core because of the buildup. Open the hood and have someone turn the ac on, see if and how many times the compressor clutch turns off and on, it should not cycle off and on frequently. If it does then you have a small leak and not enough coolant pressure to keep the clutch engaged, you will have to check for leaks then and fix it, also it could mean a highpressure switch problem, but im leaning towards the clogged evap core and then small leak