So the other day I noticed a strange rattling sound coming from my new Lennox outdoor unit and it was loud! I then received an error code on my t-stat and called the company that installed the system about 1 month ago. Well the tech came out and added a "hard start kit" and things are fine now. While he was working on the unit he found the yellow energy sticker. It stated that the SEER of the unit was 14.5, but the brochure I received from the dealer said the unit at my tonnage was 16.7 SEER. Why would there be such a discrepancy? Did I get something other than what I paid for?