LG standard (non-inverter) window air conditioners LW8016ER / LW1016ER (R-32, rotary): quick sheet

Covers: LG fixed-speed electronic window units with remote, 2023 spec sheets: LW8016ER (8,000 BTU/h, top-down chassis) and LW1016ER (10,000 BTU/h, slide in-out chassis), both 115 V, rotary compressor, R-32. Model reading: LW = LG window, the next two digits = nominal capacity in thousands of BTU/h (LW8016ER = 8,000, LW1016ER = 10,000). LW...IVSM Dual Inverter units are covered in their own sheet. Other LW sizes of the same family (e.g. LW6017R, LW1216ER, LW1816ER) follow the same pattern; confirm details on their own spec sheets. Search terms: LW8016ER, LW1016ER, LG window AC CH04, LG window FL.

Single sourceBrands: LG4 components

Simple thermistor-controlled window units: rotary compressor, turbo indoor fan, 3 cooling and fan speeds, filter alarm and power-failure auto restart. The only code LG documents for window units is CH04 / FL (condensate not draining); most other calls are airflow, electrical or installation (tilt).

Safety first

Plug directly into a grounded 115 V outlet; no extension cords.
R-32 is mildly flammable: refrigerant work is blocked and goes to an EPA 608-certified technician.

How it works

Thermistor control cycles the compressor to the set temperature; an Energy Saver function is listed on both spec sheets.

LG says window units are designed so that condensate evaporates naturally during operation, and that in rainy or very humid weather more water collects and the unit can show CH04 (FL on some models) while still cooling normally.

Auto restart brings the unit back in its last mode after a power cut.

Components & tests

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Official manufacturer documentation

Always confirm values against the tech sheet for the exact model.

OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Building facade with window and wall air conditioner units by Willian Santos, Pexels License

Diagnostic guides for this appliance

Guide · Air Conditioner

PTAC not cooling (fan runs, air not cold)

Most PTAC no-cool calls are airflow (filter, coils), a wrong control setting or a failed compressor start component. Rule those out before suspecting the sealed system.

6 steps ~60 minmoderate

Guide · Air Conditioner

PTAC not heating (electric heat or heat pump)

PTACs heat with electric strip heat, a heat pump, or both. Heat pump models switch to strip heat in cold weather. Check settings, then the heater element and its limits, then the reversing valve.

5 steps ~60 minmoderate

Guide · Air Conditioner

PTAC error codes: how to read and clear them

Most PTAC brands store fault codes that can be shown with a button combination on the control (for example, on GE Zoneline (2019 technical service guide) you hold FAN and the red AUX button together while the unit is OFF, and AUX clears stored faults; other models use other sequences, so use the model's tech sheet). Read the active code, fix the cause, then clear it.

4 steps ~20 mineasy

Other air conditioners manuals

Manual · Air Conditioner

Carrier Infinity Greenspeed 24VNA6 air conditioner and 25VNA4 heat pump (variable speed): quick sheet

Carrier Infinity Greenspeed Intelligence variable-speed outdoor units: 24VNA6 air conditioner (up to 26 SEER) and 25VNA4 heat pump (up to 24 SEER, up to 13 HSPF), 2-5 ton. Nomenclature from the service manual: 24 = AC, 25 = HP; V = variable speed; N = Infinity series; A = Puron (R-410A); 6 / 4 = SEER tier; two digits = nominal capacity (e.g. 36 = 36,000 BTU/h); voltage digit 3 = 208/230-1; compressor ID 4 = variable-speed scroll, 5 = variable-speed rotary. Serial format: week + year + plant letter + sequence (e.g. 0118E00001). Other 24VNA families (24VNA0, 24VNA9) use different software and code lists.

5 components4 common failuresCarrier

Manual · Air Conditioner

Trane XV20i / XV18 variable-speed outdoor units (4TTV0 AC, 4TWV0 heat pump, ComfortLink II): quick sheet

Trane variable-speed TruComfort / ComfortLink II communicating outdoor units: 4TTV0 air conditioners (XV20i family, e.g. 4TTV0024A1000C, 4TTV0036, 4TTV0048, 4TTV0060, 4TTV0061) and 4TWV0 heat pumps (Service Facts 4T-V0-SF). They use an Integrated Variable Speed Control (IVSC) board and a Communicating Display Assembly (CDA) in the outdoor unit. Distributor listings note several 4TTV0 revisions; confirm the full model on the nameplate before ordering parts. Single-stage XR14/XR16 units are on a separate sheet.

4 components3 common failuresTrane

Manual · Air Conditioner

Lennox XC21 air conditioner and XP21 heat pump (Dave Lennox Signature, iComfort-enabled): quick sheet

Lennox XC21 (air conditioner, service literature Corp. 1007-L2) and XP21 (heat pump, Corp. 1031-L7), 2, 3, 4 and 5 ton, R-410A, expansion valve indoor coils only. Both use an A175 main control (outdoor control part number 101798-xx) that works in communicating (iComfort) or conventional 24 V mode, plus a separate fan motor control. The XP21 literature describes a two-stage scroll compressor; the 2018 XC21 literature describes the compressor as one-stage while the same control section covers two-stage units, so confirm staging on the nameplate. For ML14XC1/EL16XC1 single-stage units see the separate sheet.

4 components3 common failuresLennox