Bought a use condo that came with an existing Four Star service contract. Made a service call because one AC zone had stopped working and the other one was very loud, including a whistling noise from the return duct as if it could not get enough air volume in the return flow. The first technician, Mr Barry Gillespie, was very courteous and knowledgeable. He quickly diagnosed the problem with the non-working unit and had it going in no time. He then checked out the other unit which 4 Star had installed for the previous owner about 4 months ago. He found that the installers had not put a slot in the newly installed system to put an air filter in. NO AIR FILTER !!!! He also discovered that there was insufficient volume for the air duct primarily because one of the 3 original return ducts had never been hooked up. It was not 4 Star's fault that the original builder had not connected the third return to the original system but it is inconceivable that the 4 Star installers would not have found the problem when they installed the new system 4 months ago. 4 Star sent two techs out via a second trip and they installed a filter door (no filter though) and connected the return ductwork by an elaborate scheme of duct tape and pieces of duct foam. Not pretty but it does seem to be doing the job for For the moment. 4 Star should have correctly installed the new unit the first time.
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