LG mini split error code CH07
Operating mode conflict (multi-split). Also shown as CH 07, CH7.
- TypeProtection
- SystemOperation
- Can I fix it?Usually a homeowner fix
What CH07 means on a LG
On a multi-split, one indoor unit is asking for heating while another asks for cooling. The zone that lost shows CH07 and waits.
On this platform, CH07 is a protection: the system stopped or throttled itself to prevent damage; many clear on their own once conditions return to normal.
Common causes
- Zones set to opposite modes.
- A zone in Auto mode flipping to the opposite mode.
How to fix it yourself
You can almost always clear this yourself with the steps below.
- Set every zone to the same mode; Fan-only does not conflict.
- Avoid Auto mode on multi-splits.
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
Not a fault.
Which LG units show CH07
This page applies to LG Art Cool, Standard, Mega and Multi F units. LG's own documentation lists CH07 as "Operating mode conflict (multi-split)", 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 CH07:
Questions people ask
Can I reset a LG CH07 code myself?
Yes. Turn the system off at the breaker for five minutes, then restart it. If CH07 comes back, the fault is real and needs the checks above.
Is it safe to keep running a LG showing CH07?
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 CH07?
You can almost always clear this yourself with the steps below. Not a fault.
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.