LT123CNR
LG LT123CNR Wall Unit AC Repair
Most common issues on this model
- Fan that runs but gives no cold air
- Auto Cool not holding the room temperature
- Coil frost or clogged filter
- Air direction louver movement
- Water at the sleeve from a blocked drain
Part of LG’s older wall air conditioner line, the LT123CNR is a legacy model that you may still find in apartments and older houses. It uses a universal sleeve fit, a Gold Fin treated coil, three cooling and fan speeds with Auto Cool, and 4-way air direction. LG pairs it with an LT123HNR version.
Service on an older sleeve unit begins with the simple things. We look at the filter, the coil and the louvers, check that the blower turns freely and that the compressor starts without hesitation, and watch for water around the drain. If Auto Cool misbehaves, we test the sensor and board. Before parts are ordered we verify the model and serial on the label, and the price is written down for your approval.
Key features
- Wall unit with a universal sleeve fit
- Gold Fin anti-corrosion treatment
- Auto Cool with three cooling and fan speeds
- Four-way air direction
- LT123HNR listed alongside
Error codes this model can show
Can the louvers be repaired?
Usually, yes. The 4-way air direction relies on moving vanes and a linkage that can loosen or crack. We look at what moves, what is stuck, and whether the part is still available for this model.
Is an LT123HNR the same as mine?
Both numbers are listed together, but we do not assume they match. We read the label on your unit and order parts for that exact number.
How long does a diagnosis take?
A basic diagnosis of a wall unit covers airflow, fan speeds, compressor start and drain. We give you a written price before any repair work, and repairs carry a 30-day workmanship warranty.
Book repair for your LT123CNR
Book in about a minute, or call the desk. Same-day windows inside the Loop on most days, next-day across the rest of Houston.