Service Letters
YS-005-22 4.x.x.xx Firmware Field Updating to 4.3.0.15Download | Details
YS-004-22 Commercial Condenser and Evaporator Coil Sensor Failures Download | Details
YS-002-22 - high pressure switch failuresDownload | Details
YS-001-22 Factory Installed Expansion Valve Equalizing Tube (YS-002-2019 Updated)Download | Details
YS-007-2021 Premier Uninstalled Sensor Faults Download | Details
YS-006-2021 Modulating Gas Furnace Download | Details
YS-004-2021 Residential Control Transformer Defect-208 Volt Applications OnlyDownload | Details
YS-003-2021 expansion valve equalizing tube amendedDownload | Details
YS-002-2021 heat pump blocked suction process tubeDownload | Details
YS-002-2020 - 14 seer heat pump nuisance low pressure trip - 3.5 ton models final version 4Download | Details
YS 001-2021 OVS fault on Delta MS300 VFD’sDownload | Details
YS-008-2020 17 Seer AC ECM Motor Change Download | Details
YS-007-2020 premier supply fan trackingDownload | Details
YS-006-2020 Premier Air Flow Station Sensor Location ChangeDownload | Details
YS-005-2020 heat pump blocked suction process tube Download | Details
YS-003-2020 Unit Harness Modification for Condensate OverflowDownload | Details
YS-001-2020 Furnace motor location adjustment Download | Details
YS-005-2019 Eratic Blower Operation PCG6Download | Details
YS-004-2019 YHM Control BoardsDownload | Details
YS-003-2019 Flooded Unit Policy Download | Details
YS-002-2019 Expansion Valve Equilizing Tube Issue YHE YHMDownload | Details
YS-001-2019 Pressure Switch Fault On 90% Single Stage Furnace Download | Details
YS-SP01-2018 White Rodgers Two Stage Control Board Issue Blower Wiring Download | Details
YS-007-2018 Clear Drain Pan Replacement Download | Details
YS-005-2018 Control Board Logic Error YHMDownload | Details
YS-004-2018 Map Upgrade to Ver 4Download | Details
YS-002-2018 Match Up Issues YHE36 AE24Download | Details
YS-003-2018 Indoor Coil Performance Issue Resolution Horizontal Right and Downflow ApplicationsDownload | Details
YS-001-2018 Update On Compressor Suction TubeDownload | Details
YS-010-2017 YS-033 Through 36-2015 Metering DeviceDownload | Details
YS-012-2017 Flood Damaged EquipmentDownload | Details
YS-015-2017 Ambient SensorsFailuresDownload | Details
YS-008-17 CondensateMgmtIssueNewPlatformNcoilsandAirHandlersRev1Download | Details
YS-006-2017AlternateR22RefrigerantDownload | Details
YS-004-2017 Non-Condensing; 80k BTU; Burner Ignition IssueDownload | Details
YS-017-16 LX ResPac Burner Ignition IssueDownload | Details
YS-016-16CM64DHorizontalCondensateManagementDownload | Details
YS-015-16 York LXSeries Package Cabinet SweatingDownload | Details
YS-014-16andM-429-2016 letter EPA warning R-22a 0501016Download | Details
YS-009-16YorkNoFaultFoundControlBoardsDownload | Details
YS-SP01-16 Defrost Sensor Placement Gen 7Download | Details
YS-001-16York Flood Damaged EquipmentDownload | Details
YS-022-15 York Electic HeatDownload | Details
YS-033-15 Refrigerant System TEV Performance IssuesDownload | Details
YS-SP007-15 Suspect Limit SwitchDownload | Details
YS-010-15 Inducer Motors Single Stage and Modulating Gas FurnacesDownload | Details
YS-001-15RegalBeloit751hpBlowerMotorsYORKDownload | Details
YS-016-14 Silicon Titride Ignition IssueDownload | Details
VASL-001-14 Contaminants affecting TEV PerformanceDownload | Details
YS-010-14 HP Reversing Valve YZF UnitsDownload | Details
YS-007-2014 - Possible Micro-Channel Coil LeakDownload | Details
YS-019-13 Affinity Split HP control Box Snow KitDownload | Details
YS-016-13D Affinity ResPac Pilot BracketDownload | Details
YS-005-13 No Fault Found Control BoardsDownload | Details
YS-037-12 York X-13 Blower Motor failuresDownload | Details
YS-013-12YorkFurnaceCondensatePanFollow-UpDownload | Details
YS-010-12 York 33inch Furn New Condensate Pans Production UpdateDownload | Details
YS-004-12 York MicroChannel E-Coat OptionDownload | Details
YS-001-12 York New Condensate Pans All 33 inch 90 furnace modelsDownload | Details
YS-029-11 York Cracked Condensate PansDownload | Details
YS-025-11 York No fault light ignition small sunlineDownload | Details
YS-022-11 York Microchannel coils spiking head pressure on startDownload | Details
YS-010-11 YCJF TCJF TCGF Charging ChartsDownload | Details
YS-045-10 York 33inch two stage UTEC Control Bd IssuesDownload | Details
YS-042-10 Demand Defrost Board with Compresor Delay on Curve 2 Download | Details
YS-039-10 33inch Condensate in Intake Pipe York RevisionDownload | Details
YS-033-10 TM9V Low CFM due to Control board issueDownload | Details
YS-014-10 Defrost Issues and Coil Matchups YZE, YZHDownload | Details
YS-010-10 York Fan Grill Rattling on Predator 6.5-12.5 ton UnitsDownload | Details
YS-007-10 YZB YZE YZH Defrost Control Board IssuesDownload | Details
YS-004-10 Condensate Pan Enhancements YP9C, YM9M, TM9V, TM9T, TM9X, TG9S, and GC9SDownload | Details
APB-01-10 Retrofit R-22 with R-410A ProductsDownload | Details
YS-047-09 Loss of Charge Protection - All THGD YHJD GHGDDownload | Details
YS-044-09 Lau Blower Wheel Vibration YorkDownload | Details
YS-038-09 YZB024 030 YZE024 Loss Of Charge Switch locaitonDownload | Details
YS-035-09 Single Stage Control Boards Follow Up to YS-005-09Download | Details
YS-005-09 REVISION 2 York Emerson Control BoardDownload | Details
YS-032-09 Flood Damaged EquipmentDownload | Details
YS-029-09 York UPG Technical Services communication letter Download | Details
YS-026-09 York Low Pressure Switch Trips YZB-YZEDownload | Details
YS-005-09 REVISED York Emerson Control BoardDownload | Details
YS-011-09 York Major Comp in Lieu of UnitDownload | Details
YS-014-09 York 40inch Mod InducerDownload | Details
YS-008-09 Mod Furnace Pressure Switch TubingDownload | Details
YS-002-09 York 40inch pressure switches RCDownload | Details
YS-023-09 YZH Fan OperationDownload | Details
YS-051-08 York pressure switche failuresDownload | Details
YS-045-08 REVISED York NG33 Lau 4 ton Blower Wheel 12-3-2008 Download | Details
YS-058-07D Coil Leak Letter for DealersDownload | Details
YS-039-08 York Cracked Condensate Drain Pans YP9C YM9M TG9S GG9SDownload | Details
YS-019-08 3-6 ton Sunline Roll Out TripsDownload | Details
YS-016-08 York Muffler Kits YZE Heat PumpsDownload | Details
YS-013-08 York Outdoor ECM Motor FailuresDownload | Details
YS-10-08 YZE LP switch tripsDownload | Details
YS-004-08 SJ incorrect CapacitorDownload | Details
YS-073-07 Res Product Snow KitsDownload | Details
YS-070-07 Flattened Fins on SJ JP Packaged units Download | Details
YS-061-07 BXH Cond Fan Mis-WireDownload | Details
YS-067-07 AHP AVY Air Handlers with high humdityDownload | Details
YS-073-07 Res Product Snow Kits attDownload | Details
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