Error code · Room Air Conditioner

LG Air Conditioner Codes CH32, CH33, CH36, CH38, F4: Refrigerant and Compressor Group

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Code: CH32, CH33, CH36, CH38, F4
Appliance: Room Air Conditioner
Brand: LG
Warranty: 30-day workmanship

What CH32, CH33, CH36, CH38, F4 means

These codes appear on LG air conditioners that show CH codes, including split systems with an outdoor unit. The shared meaning is a refrigerant or compressor-related problem. Only CH38 and F4 are explained individually: they mean the unit is low on refrigerant, and piping connections should be checked after an installation or a relocation. The owner sees the code, and the unit cools weakly or not at all.

Common causes of CH32, CH33, CH36, CH38, F4

Low refrigerant from a piping connection that is not tight
Refrigerant circuit condition affecting the compressor
Compressor protection responding to the circuit
Temporary power or control event

✓ One safe check you can try

1. If the code appeared right after an installation or a move, contact the installer. 2. Otherwise, switch the unit off and reset power for five minutes. 3. Restore power and run it briefly while watching the display. 4. If the code returns, turn it off and arrange service.

! Why to stop there

Only CH38 and F4 are described individually, so for the others we read the circuit with gauges and sensors before deciding.
The sealed refrigerant system is handled only by us with the right equipment, never as a homeowner step.
We tell you what we measured and quote the repair in writing.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Room Air Conditioner codes

LED Too BrightLG Air Conditioner LED Too Bright: Remote Brightness Control LoLG Air Conditioner Message Lo: Low Room Temperature "Outdoor Unit" MessageLG Air Conditioner "Outdoor Unit" Message: Status Display SP, CP, POLG Air Conditioner Codes SP, CP, PO: Power Cooling Mode F1, F2, F3LG Air Conditioner Codes F1, F2, F3: Fan Speed Readout FLLG Air Conditioner Code FL: Condensate Tank Full HiLG Air Conditioner Message Hi: High Room Temperature Lamp Does Not LightLG Air Conditioner Lamp Off After Shutdown: Filter Alarm Timing

CH32, CH33, CH36, CH38, F4CH32, CH33, CH36, CH38, F4 questions

Does CH38 always mean a leak?

It means the unit is low on refrigerant. After an installation or relocation, a loose piping connection is a common reason, so the installer is the first call. Otherwise we test the circuit.

Is F4 the same as CH38?

Both are described as low refrigerant. The letters differ by display style, and the repair path is the same: confirm the connections, then test the system.

Can I add refrigerant myself?

No. The refrigerant circuit is sealed and needs proper tools and training. Adding refrigerant without finding the cause only hides the problem, so we locate the cause first.

Book a visit

Still seeing CH32, CH33, CH36, CH38, F4?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 597-5662