LG mini split error code CH32
Discharge temperature too high. Also shown as CH 32, CH32.
- TypeProtection
- SystemCompressor / inverter
- Can I fix it?Homeowner checks, then maybe a tech
What CH32 means on a LG
The refrigerant leaving the compressor got hotter than the safe limit. Often low charge.
On this platform, CH32 is a protection: the system stopped or throttled itself to prevent damage; many clear on their own once conditions return to normal.
Common causes
- Low refrigerant charge.
- A blocked outdoor coil or failed fan.
- A partly closed service valve.
- A failing compressor.
How to fix it yourself
Work through the checks below first; they resolve most cases. If they do not, the repair itself may need a technician.
- Look at the outdoor unit: clear leaves, cottonwood fluff, snow or ice from the coil and make sure the fan can spin freely and nothing is stacked against the cabinet.
- Confirm the service valves are fully open.
- Cool down with power off for 30 minutes and retry.
- Anything inside the refrigerant circuit (sensors are fine, but valves, compressors and leaks are not) needs EPA-certified refrigerant handling. That is a technician job.
Switch off power at the breaker before opening either unit. Capacitors in the outdoor unit hold a charge for several minutes after power is cut.
When to call a technician
Recurring CH32 with a clean coil needs a charge check.
Which LG units show CH32
This page applies to LG Art Cool, Standard, Mega and Multi F units. LG's own documentation lists CH32 as "Discharge temperature too high", the same definition used across the LG it is built on. If your unit shows a code with a different shape (for example a four-character code, or a plain number), it is from a different table; use the lookup with your exact code.
Where LG shows this code
The indoor display shows CH followed by a number (CH05, CH38). Units without a display blink the indicator lamps in a pattern; the outdoor board LEDs blink the same number. If someone tells you 'CH 5', that is CH05. CH01 to CH12 are indoor-unit faults, CH21 to CH29 are inverter and compressor faults, CH32 to CH38 are refrigerant-side protections, CH40 to CH48 are outdoor sensors, and CH51 to CH73 are outdoor-unit system faults.
Other LG codes
Same part of the system as CH32:
Questions people ask
Can I reset a LG CH32 code myself?
Yes. Turn the system off at the breaker for five minutes, then restart it. If CH32 comes back, the fault is real and needs the checks above.
Is it safe to keep running a LG showing CH32?
Not repeatedly. A protection code means the unit stopped itself to prevent damage, and resetting it over and over can turn a cheap repair into a compressor failure. Reset once, check the basics, and stop if it returns.
Do I need a technician for LG CH32?
Work through the checks below first; they resolve most cases. If they do not, the repair itself may need a technician. Recurring CH32 with a clean coil needs a charge check.
Sources
- LG residential split service manuals (error code tables)
Updated September 2026. Codes and definitions vary by model year. If your manual disagrees with this page, your manual wins. Send a correction.