I replaced a compressor in a 7.5 ton Carrier roof top unit on a restaurant recently. It went well and the unit runs fine. I went back a few days later to check things out and found a big oil spot on the condensing coil. It looks like a pretty good leak. This unit is 10 years old and in hind sight I shoud have probably just replaced the unit. But it seemed pretty sound.
I feel bad for the owner since he spent his good money after bad equipment.
My question is, this refrigerant stop leak. Does it work ?
I think if I could get him through this summer, he'd replace the unit next year. The coil is leaking around the galvanized end plates. So it can't be fixed.