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LW1821HRSM (AT3AHDP) LG Air Conditioner - Overview

Diagrams for LW1821HRSM

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Fan Assembly,Axial – Part Number: 5900AR1508B
No Longer Available
Fan Assembly,Axial
★★★★★
★★★★★
(1)
Part #5900AR1508B
This fan assembly or also known as a condenser fan blade is used in air conditioners. The blade fits onto the motor shaft and distributes air over the condenser to cool the refrigerant before it goes into the evaporator. This part blows air parallel to the motor shaft which the blade rotates on to successfully circulate the air. It is made from white plastic. *Please note: This part is sold individually. This part comes with a slinger ring. Refer to the manual provided by the manufacturer for installation instructions and further guidance.
CLAMP,SPRING – Part Number: MBU64446302
$8.55
Special Order
CLAMP,SPRING
Part #MBU64446302
Thermistor,NTC – Part Number: 6323A20003S
$17.15
In Stock
Air Conditioner Installation Kit – Part Number: AET73371401
$87.98
On Order
Air Conditioner Installation Kit
Part #AET73371401
The installation kit contains the hardware you need to install the room air conditioner in a window. The kit also includes the accordion filler panels, installation brackets and seal.
Fan Assembly,Blower – Part Number: 5834AR1599B
No Longer Available
Axial Fan Assembly – Part Number: 5900AR1508G
$79.80
In Stock
Axial Fan Assembly
★★★★★
★★★★★
(1)
Part #5900AR1508G
This is an authentic OEM replacement part sourced directly from LG. This axial fan assembly, also known as a condenser fan, is commonly used in air conditioners. This compact propeller like fan fits on the motor shaft and circulates air over the condenser to help cool off the refrigerant. This fan blows air parallel to the motor shaft that the blade rotates on, which is why it is able to successfully circulate the air over the condenser. This fan is made out of white plastic, and it is sold individually. Make sure you unplug the air conditioner before you start this repair.
Electric Heater – Part Number: 5300A20003V
$129.67
In Stock
PCB ASSEMBLY,RF – Part Number: EBR85871801
$98.18
In Stock
PCB ASSEMBLY,RF
Part #EBR85871801
This control board manages cooling functions and communication between refrigerator components. Reliable operation helps maintain consistent temperatures and overall system performance. Replacing a defective board restores dependable cooling behavior.
Air Cleaner Filter Assembly – Part Number: 5231AR6159G
$36.85
In Stock
Air Cleaner Filter Assembly
Part #5231AR6159G
POWER CORD ASSEMBLY – Part Number: EAD63469507
No Longer Available
POWER CORD ASSEMBLY
Part #EAD63469507
PCB ASSEMBLY,DISPLAY – Part Number: EBR89597604
$53.20
On Order
PCB ASSEMBLY,DISPLAY
Part #EBR89597604
PCB ASSEMBLY,MAIN – Part Number: EBR88859920
$79.80
On Order
PCB ASSEMBLY,MAIN
Part #EBR88859920

Questions And Answers for LW1821HRSM

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Tony - For model number LW1821HRSM
June 20, 2025
Compressor runs continuously even when power is off. What part do I need? AT3AHDP
Chris Boyle Profile
Hi Tony, thank you for reaching out. If the air conditioner compressor runs continuously even when the power is off, the most likely culprit is a faulty control board. The PCB assembly listed for your model is part number PS12715654. We hope this solves your problem!
$98.18
In Stock
PCB ASSEMBLY,RF
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Common Symptoms of the LW1821HRSM

How this model fails, and the parts that fix it.

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Old fan had broke off three of the five blades. broke part of the blades off
1 person found this instruction helpful.
  • huey from MONROE, LA
  • Really Easy
  • 30 - 60 mins
  • Pliers, Screw drivers
I pulled out the insert of the air conditioner, and took all the screws apart from the condenser the fan shroud to get to the fan. the part that I ordered worked perfect.
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Broken fan assembly
1 of 12 people found this instruction helpful.
  • Drucilla from Vinita, OK
  • Really Easy
  • 30 - 60 mins
  • Screw drivers, Socket set
everything went great and was just as planned. We now have cool air in the shop for us to do our handy work. Thanks, Dale Heltzel
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