York S1-373-27956-417 Evaporator Coil

The York S1-373-27956-417 Indoor A-Coil is a factory York Source 1 A-Flex evaporator coil built as a 3-row, 22-inch high by 24-inch wide replacement for residential and light commercial split-system air conditioners and heat pumps. The factory label on the coil reads S1-37327956417, which is the same part number written without dashes, so either form identifies this coil. Mounted in the air handler or furnace plenum, the indoor evaporator coil is where the cooling actually happens: low-pressure refrigerant boils inside the copper tube circuits, the blower pulls warm air across the aluminum fins, and the coil removes both sensible heat and moisture from the air stream before it goes out to the ductwork.

The product photo shows the A-frame layout that gives this coil its name: two tube-and-fin slabs meeting at the top under a sheet-metal cap, copper distributor and refrigerant stub-outs on one side, and a molded drain pan with black foam pads at the line-set openings along the base. The photo also shows loose galvanized sheet-metal strips and small clips supplied with the coil. York's own description for this coil is A-Flex 3R 22H 24W: the R is the number of tube rows, the H is the coil height and the W is the coil width, in inches. Sibling coils in the same series, S1-373-27956-405, S1-373-27956-407 and S1-373-27956-419, carry different row counts and cabinet sizes, so the last three digits matter and a near match is not a match. York's other A-Flex coils, such as S1-373-27868-403, follow the same naming system with their own sizes.

Before you order, measure the old coil (or the opening it sits in) for height and width, count the tube rows, and read the data plate on the air handler or furnace for the refrigerant type and metering device (piston or TXV), because the new coil has to match all of them. Indoor coils are normally replaced for formicary corrosion pinhole leaks (a system that keeps losing charge, with oil staining on the tubing and a positive nitrogen-and-soap or electronic leak test), for physical damage to the fins or tube bends, or after a freeze-up caused by chronic airflow problems. On the install, recover the charge per EPA Section 608, braze with a nitrogen purge, replace the liquid line filter drier, pressure test, pull a deep vacuum to 500 microns, weigh in the charge, seal every gap around the coil cabinet and confirm the condensate drain slopes freely.

Key Benefits

• OEM York Source 1 Part: Built to York's own specification as the York S1-373-27956-417 assembly, not a universal or generic coil.
• 3-Row A-Flex Capacity: Three tube rows in a 22-inch high by 24-inch wide A-coil, sized for a specific cabinet opening.
• Pan and Hardware Shown: The product photo shows the molded drain pan, foam pads at the line-set openings and the loose sheet-metal strips that come with the coil.
• Clear Numbering: The dashless S1-37327956417 on the label and the siblings S1-373-27956-405, S1-373-27956-407 and S1-373-27956-419 make it simple to confirm you are ordering the right size.

Common Questions

• What size is the York S1-373-27956-417? It is an A-Flex indoor coil with 3 tube rows, a 22-inch height and a 24-inch width.
• Is S1-37327956417 a different part? No. S1-37327956417 is the same part number as S1-373-27956-417 without the dashes; it is how the number prints on the coil's factory label.
• Can I use a different York coil if the size is close? Only if the cabinet opening, row count, refrigerant type, metering device and line connections all match. The siblings S1-373-27956-405, S1-373-27956-407 and S1-373-27956-419 are different sizes, so confirm against the unit's data plate or model number first.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.