On June 15, 2021 I arrive to a new customer for a no cool upon arrival agree to the customer and they stated that the unit wasn’t cooling like it did last summer I checked the condenser and found that it had a oil spot in the condenser fins are use my leak detector test it I did get a hit off of leak detector I showed the customer customer stated that he only wanted it fill it up to see how long it will last and then he will decide from there if he’s going to replace the condenser or just keep adding refrigerant I added 2 pounds of 410 unit had 12° superheat it was a piston system everything is working properly at this time thank you for your business Mike T