LG No Power to Indoor Unit

Indoor unit does not power on at all (no lights, no response to remote).

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

Tripped circuit breaker or blown fuse, Faulty indoor power supply board, Loose or burned wiring at indoor terminal block, Defective main indoor PCB

How to Fix / Troubleshooting

Safety: Always turn off the main breaker before removing covers or touching wiring.

Steps:

  • Check breaker: Locate the dedicated breaker for the air conditioner and reset it if tripped. If it trips again immediately, leave it off and call a technician.
  • Verify outlet or supply: For window or portable LG units, test the wall outlet with another appliance to confirm power.
  • Inspect indoor unit wiring: Remove the indoor front cover and access the terminal block. Look for loose screws, burned insulation, or disconnected wires. Tighten loose terminals with power OFF.
  • Check internal fuse: Many LG indoor PCBs have a small glass or cartridge fuse. If visibly blown, replace with the exact same rating. If it blows again, stop and call a technician.

Technician recommended: If power is present at the terminal block but the unit remains dead, the indoor PCB or power supply module likely needs replacement.

Advertisements

Repair Difficulty

Medium 3/5

Required Part

Indoor Control PCB
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements