I have bought a IP early this year. The Evaporative Cooling System worked when I did the final hand-over inspection. However, tenants have recently started using Evaporative Cooler and complained it did not work. It is a ducting system, branded Brivis. Should I call a service from Brivis (Book A Service Call | Brivis Australia ) or get a free quotes from air-conditioner technicians before fixing it? which way save my money?