The clutch will not engage if the system is low on refrigerant so let's do a check using a simple recharge unit from the local parts store. Here is a video that will help with a guide, and I have included an Amazon link to the set up you need.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.