We purchased a condo a few years ago and ever since we have had problems with the A/C.
Every few month the unit runs out of freon. First they found a leak in the unit inside, after this was fixed they found another leak outside. Now there still seems to be a 3rd leak - after lots of tests done and lots of money spend. They suspect this leak to be in the coper piping underneath the condo building and they will need to run a new line up the side of the building into our 3rd floor unit. The estimate is $1800. Any chance this is covered by insurance? I'm guessing our insurance for the unit won't cover it but what about the condominiums master policy?

Sorry but I have never heard of this being covered...

This is not a loss that would be covered by either policy.

This falls under regular maintenance. As a homeowner, you are responsible for the upkeep of your home. The master policy covers outside structures and your personal homeowner's policy covers from the walls inward. And then only sudden losses are covered.

If you'd purchased a homeowner's warranty, the a/c unit may be covered under that.