I’ve just purchased a fiesta 2016 Mileage 18000, after a hot summer the air con has been on a lot. There’s been a strange noise in the cabin from air con, it sounds like a small water fountain within the cabin. I’ve taken it back to the dealer who had it on the ramps to check if there was a blockage but the condensation was flowing out of the drain pipe fine. It’s been back to ford under a warranty and they believe there isn’t anything wrong with the air con. But the noise is still there I’m taking it back to the dealer this weekend. 🤷🏼♂️ Can anyone help with this issue.