LW1221HRSM
LG LW1221HRSM Window AC That Heats and Cools Repair
Most common issues on this model
- Heating mode that blows cool air
- Switching between heat and cool
- ThinQ app control
- Cooling output and coil condition
- Drain flow and window seal
The LW1221HRSM is an LG window air conditioner that heats as well as cools, rated 12,200 BTU for cooling and 11,200 BTU for heating. It can be controlled from the ThinQ app and lists Energy Saver mode and 4-way air direction.
A two-season unit needs two checks. In cooling we look at the filter, coil, fan and compressor start. In heating we confirm the room air is actually warming and that the unit changes modes cleanly. If the app is involved, we test the unit from its own panel first. The model and serial on the label tell us which parts fit, and we show you a written price before any repair work.
Key features
- Window unit that cools and heats
- 12,200 BTU of cooling and 11,200 BTU of heating
- ThinQ app control
- Energy Saver mode
- Four-way air direction
Error codes this model can show
Why does it blow cool air in heat mode?
It may be a mode or sensor problem, or the heating side may not be working. We test the selector and the heating circuit before suggesting a repair.
Does the heating rating differ from cooling?
Yes. The listing gives 12,200 BTU for cooling and 11,200 BTU for heating, so the unit puts out slightly less in heat. We compare what it delivers against those figures.
Is the unit meant for year-round use?
It is made for comfort in both seasons. Heavy use means the filter and coil need regular attention, which we check during a repair visit.
Book repair for your LW1221HRSM
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.