Purchased at Camping World and they did not give manuel. We do not know model number or serial number. These were not furnished to us and we do not know where they are located on the AC. This AC is a 15,000 Brisk Air with Heat strip for a 31 foot Airstream trailer. Can you help us. Email address is joyner1253@windstream.net or phone number 229/377-1533. Cecil G. Joyner Thanks for your help!