I know I have a small leak somewhere in the system. Every year it needs to be recharged. I know it's not a DIY job to fix the leak, but am confident I can at least find it prior to tech arriving. It's a split unit, furnace in attic, AC outside. Where the lines run up the wall, I noticed a 6-8" "greasy" spot on the drywall. Am I correct in assuming this is where the leak probably is located?
I've read various reviews about the HVAC Super leak, what's the consensus here on it's use?
The system in question is 9 years old and getting more expensive to recharge everywhere thanks to the EPA.