We work on more LG units in Khamis Mushait than in any other city we serve, and the pattern we see isn't random: electronic failures on LG units are more common here than in Abha — and the cause is dust, not a defect in the equipment.

What does dust have to do with a circuit board?

This is the link most technicians miss. Follow the sequence:

  • LG leans heavily on inverter technology, and at its heart is an inverter PCB in the outdoor unit that controls compressor speed.
  • That board generates heat while running, and is cooled by a heatsink that depends on air moving through the outdoor unit.
  • Dust clogs the condenser coil and reduces airflow — so the temperature inside the whole outdoor enclosure climbs.
  • The power board is now running hotter than it was designed for, for hours, every day. The electrolytic capacitors on that board are the first thing to surrender to sustained heat.

So an LG unit in Khamis Mushait can lose its board not because the board is poor, but because nobody washed the coil. A conventional (non-inverter) unit in the same conditions would merely lose efficiency. An inverter loses a board.

What we check on LG units specifically here

  • Read the error codes first — LG gives precise codes, but a code tells you the symptom, not the cause. A code pointing at the board doesn't mean the board is the root problem.
  • Measure outdoor unit temperature and airflow before condemning any electronic component.
  • Wash the condenser coil. Replacing a board without washing the coil means a second board a season later.
  • Check voltage stability. Inverter electronics are less tolerant of voltage fluctuation than conventional units.

So is an inverter the wrong choice in Khamis Mushait?

No — it's the cheaper choice in a city where ACs run sixteen hours a day; the electricity saving is real. But it's a choice that assumes regular maintenance. A neglected inverter in a dusty environment costs you more than it ever saved.

We are not an LG agent — and that works in your favour

RawaCool is an independent service workshop. We are not an authorised agent or official representative of LG. If your unit is still under a valid manufacturer warranty, going to the authorised agent is usually the better move for you — and we'll tell you so rather than take the work. Out of warranty, being independent means we aren't selling you a brand, and we have no interest in pushing a replacement when a repair will do.

Frequently Asked Questions

Why do LG control boards fail in Khamis Mushait?
Usually heat, not a defect. The inverter board in the outdoor unit is cooled by airflow; when dust clogs the condenser coil, the temperature inside the enclosure rises and the board runs beyond its thermal limit every day until its capacitors give out. Washing the coil is board protection.
I replaced the board and it failed again. Why?
Because the cause wasn't addressed. Replacing the board without washing the condenser coil puts a new board into the same hot environment that killed the first one. We insist on washing the coil and measuring enclosure temperature before fitting any board.
Is an inverter the wrong choice in a dusty city?
No. The electricity saving is real given the long run hours here. But it's a choice that assumes regular maintenance — a neglected inverter in a dusty environment costs more than it ever saved.
Are LG error codes enough to diagnose a fault?
LG gives precise codes, but a code tells you the symptom, not the cause. A code pointing at the board may actually be caused by a dirty coil raising the enclosure temperature. We verify by measurement before replacing any part.
Are you the authorised LG agent in Khamis Mushait?
No. RawaCool is an independent service workshop and not an authorised agent or official representative of LG. If your unit is under a valid warranty, the authorised agent is the better route and we'll tell you so.
Are LG spare parts available locally?
Common parts — capacitors, sensors, fan motors — are generally available. Model-specific power boards may need ordering, and we tell you the expected lead time before dismantling anything.
How quickly can you reach me in Khamis Mushait?
We target arrival within 60 minutes inside the city, around the clock. Maintenance-contract holders get priority response.
What do you check first on an LG unit that isn't cooling?
The condenser coil, the airflow and the outdoor unit temperature — before any discussion of electronics. Most of what looks like an electronic fault in this city is thermal in origin.
Do you also service commercial LG equipment?
Yes, under commercial maintenance contracts — offices, clinics and facilities. We keep a record for each unit and schedule visits outside working hours.

All LG services · AC services in Khamis Mushait