Help with Wall AC high amps

Have a Friedrich RM19J30-3 19,500 btu wall unit- 8 years old.
The unit cools for awhile but the amperage goes constantly up to where the compressor kicks out.............fan still runs. Name plate is 8.9 at 230V...When the compressor kicks in it starts at say 8 amps and just slowly creeps up over 14+.......well over rating
I saw a slight leak ( sticky )at the capacitor and replaced it.........Same problem now.
I would have to say, if it is cooler out, it stays running ( but I never checked the amps)......when it hits 85+, I have this problem.

Before I run out and buy another, anyone have ideas? I really don't want to spend $550

thanks Mike

 

Have you ever cleaned the coils? inside and out

 

No I haven't. Inside always had a clean filter changed regularly.
I will pull the unit out tomorrow and check the condenser coil.
Appreciate your help...........mike

 

Ender2272...........Thanks. The condenser was partially plugged with dirt. Blew most out with the water hose and cleaned all the debris out.
Runs like new now...amps at/lower than name plate.......But that is some job getting a wall unit out and down stairs to clean and back up for an old dude.............lol I had to hire some day workers to carry it up and then gave them some yard and moving work
But saved $400 and got some extra work done