Air Conditioner
LG
Updated Jul 18, 2026
LG AC CH32 Error — Compressor Discharge Temperature Too High & Fix
CH32
LG · Air ConditionerCH32 means the compressor discharge temperature has exceeded approximately 105 degrees C.…
Quick answer
CH32 means the compressor discharge temperature has exceeded approximately 105 degrees C. The unit stops to protect the compressor from overheating damage.
What CH32 means
The discharge temperature sensor on the compressor reads the hot gas leaving the compressor. When this temperature exceeds the safe limit (about 105 °C on most LG models), CH32 appears and the compressor stops. This is a protective shutdown — not a parts failure of the sensor itself, but an indication that something is causing the compressor to work too hard.
Common causes and fix
What does the CH32 code mean?
CH32 indicates the compressor discharge gas temperature has exceeded the safe threshold (approximately 105 degrees C). The unit shuts down to protect the compressor.
Common causes
- Low refrigerant charge (gas leak) — most common cause
- Dirty or blocked outdoor condenser coil
- Outdoor fan not running
- Restriction in the refrigerant circuit (blocked filter drier or kinked pipe)
- Compressor valve wear (reduced compression efficiency)
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How to fix the CH32 error
Power off and wait 30 minutes
Let the compressor cool.
Clean the outdoor condenser
Hose down the coil thoroughly.
Check the outdoor fan
Confirm it is running and moving air properly.
Restart
If CH32 clears and does not return, restricted airflow was the cause.
If CH32 returns quickly
The refrigerant charge is likely low. Call a technician for a leak test and recharge.
Technician actions
Leak test, repair, vacuum, and recharge with the correct gas weight.
Safety first: The discharge pipe is extremely hot during operation. Wait for the unit to cool. Refrigerant work requires a licensed technician.
Part you may need: Refrigerant service / condenser cleaning
CH32 returning repeatedly after cleaning almost certainly means a refrigerant leak. Do not keep resetting.
Frequently asked questions
Is CH32 the same as CH10?
No — CH10 is an indoor fan motor issue. CH32 is compressor discharge overtemperature, usually caused by low gas.
How do I know if it is a gas leak?
If CH32 appears, the outdoor pipes may show frost on the low-pressure side, and cooling performance will be noticeably weak before the error appears.
✎ Written by
REZAUL Karim (Riad)
REZAUL Karim (Riad) is the founder of ErrFixHub and a hands-on electronics and home-appliance repair specialist with over 15 years of experience diagnosing and fixing air conditioners, washing machines, refrigerators, inverters and other household appliances. He built ErrFixHub to turn cryptic error codes into clear, step-by-step fixes anyone can follow — cross-checking every code against manufacturer documentation and real repair-bench experience.
