What is age of condenser?

When was it last serviced by a pro?

The truth is there is very little the average homeowner can do as far as PM.

Call around to reputable dealer. Ask what the cost for a routine check of total system would be including the possibility of needing refrigerant added. And make no mistake, adding refrigerant without finding leak is a waste of time. The pros know what to look for. Adding dye to refrigerant can help find leak but it would involve a followup call in perhaps several weeks.

IMO
Good Luck!

I don't know how old the condenser is, at least 7 years.

We (she actually, I wasn't around) had a guy out last year who put some refrigerant in it. I'm not sure how well trained he may have been given he ignored an obviously dirty condenser.

I'm just curious what a "routine check" involves beyond putting a set of gauges on it.

Adding refrigerant without finding leak is called a gas n go service call. It is most unprofessional.

Condensers do get dirty. I would be more concerned about the condition of the evap coil and blower motor Asbly. These should be checked.

IMO