I have done that, amazing how many stems are sticking through the condenser. Took the top half of my home made pressure tester and used that. 1-1/2" diameter plastic plug attached to a blow gun with 1/4" plastic line so it is diffused sonewhat.While you're in there, carefully reverse blow air through the A/C condenser. You'll pick up a few degrees (increased airflow) of temperature drop across the condenser.
As a very old habit I came up with; Every-time the fan is removed, we blow out the radiators & condenser.
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