A/C clutch on 1999 Acura RL

Why the Clutch on the compressor will not engage to check. It will not click on after pressing A/C button. Think it's electrical

Asked by for the 1999 Acura RL
If the freon in the system gets too low, the low pressure cut off switch won't let power go to the compressor clutch to protect the compressor. You need to have a shop diagnose the AC system possibly just needs a recharge but the system could also have a leak.
Freon was full according to tester he said there's no click when A/C is engaged. Appears that no electrical power is getting to clutch so it can engage.
I have this issue now after replacing blower motor. Need some advise. Dont want to spend unnecessary money on guessing.
Please help.
1 more answer
It "appears", could you explain what that means? It appears your "tester" doesn't know how to test!