Hi,This is risky business in the blind, not responsible for damages on your end. Click 'accept' when satisfied.. or we can get another expert.
The coils is worth about $250 wholesale, its half day max to change it out.
He should fix the leak, and charge the unit... you should keep keep clean air fiters in it...if tis older, open up the cooling coil casing by removing 6 screws on the front and accessing the upstream side of the coil and use a green fin comb to clean the coil... your hvac guy can sell you his for 10 dollars or so.
Let me know if you need further elaboration, we can go from there, Phil
The gentalman wanted to charge 1500 for the coil and work. I was wondering if I should replace the whole system as it is a 5 ton AC that is a SEER 12 and 12 years old. How many more years of life should it have and what would an average price be for the system?