Where is the air filter for my central air conditioner and furnace? ALL Content ©2020.Support Spotlight Events About Ki Search Ki. Guild Guitar Serial # lookup : 10% complete It should be noted that many manufactures don't have complete records themselves so any progress given here are based on what we know we still have to complete for a given manufacturer and may still be missing serial numbers after '100% complete'. Warranty Lookup Parts Lookup Contact Us Repair Status Check Resources + Resources. What's wrong? The bottom line is the serial number and will begin with the year of production. : Serial Number Identification Guide Our policy of continuously upgrading and improving our products makes it impossible to keep it up to date. How can I tell whether the condenser (outdoor unit) is an air conditioner or heat pump? How can I find out the size of my air conditioner? Apple serial number check, Mac serial Decoder. This serial number style was only used during the months of April & May 1980. E 1975 E 1996 O=Filler If you come across an 'F' preceding the serial number of an R13, this indicates that the instrument has been built to an A442 - A444 and is intended for use by European ensembles. (2) Hover over each grouping to reveal pertinent info for each part of the model number.