I walked into my father's home yesterday (unoccupied at the moment, hadn't been there for over a month) and the carpets and floors were wet in half of the house. There is no water pressure. The A/C was running but not cooling (left it set on 80). No evidence of busted water heater or pipe. Plumber told me on the phone the A/C could have backed up, overflowed, and somehow cut water pressure? Can't get an expert out there yet. Can the A/C mess the plumbing up like that? I turned it off, opened the windows. Need to go back, pull carpets, etc., and get a plumber and A/C guy out there. Any ideas? Oh Yeah---years ago he had some pipes break under the slab and had tunnels dug, and all redone. Could be a recurrence?