Error code
Refrigerator error code CO
LG refrigerator error code CO: There are two boards in this cabinet: the main control behind or beneath the machine, and the display in the door. Every spelling LG publishes for it, which machines can raise it, and what to do next.
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What we can confirm
Code CO, from the manufacturer's own documentation
A code is only meaningful together with the machine showing it — the same digits mean different things on different equipment.
The code
CO
There are two boards in this cabinet: the main control behind or beneath the machine, and the display in the door. They talk over a harness that runs through the hinge, and this code says the conversation has stopped. It is worth knowing where that harness goes, because a hinge is a thing that moves thousands of times a year and a wire that runs through one is a wire under stress. The machine usually keeps cooling — the main board can run alone — but you lose control of it, and any setting you change at the display does not arrive.
or call (305) 419-0291
What it narrows down to
The main board and the display have stopped talking to each other
Diagnostic
From $95, credited to the repair
On the same appliance
What else belongs to the refrigerators
On this make a code belongs to the appliance rather than to a product line. These are the other conditions this machine can display, and the models that can show this one — a display often has more than one thing to say, and the model number decides what any of it costs to put right.
Other codes this appliance can display
The fan over the condenser has stopped turning, and the machine has noticed
The fan that moves cold around the freezer is not turning
The fan feeding the fresh food side has stopped
The sensor reporting the freezer temperature is not making sense
The fresh food compartment's own sensor is not reporting properly
The sensor that decides when to melt the ice off the coil has failed
The machine cannot read the temperature of the room it is standing in
The fan that carries cold to the ice maker has stopped
The ice maker cannot tell whether the cubes are frozen yet
The ice maker's own motor is not turning the harvest
The internal water tank is missing or not seated
The refrigerator has found something wrong inside itself and wants a technician
The same digits mean different things on different equipment. Search the full code list
In more detail
About Refrigerator error code CO
What CO means on this make
There are two boards in this cabinet: the main control behind or beneath the machine, and the display in the door. They talk over a harness that runs through the hinge, and this code says the conversation has stopped. It is worth knowing where that harness goes, because a hinge is a thing that moves thousands of times a year and a wire that runs through one is a wire under stress. The machine usually keeps cooling — the main board can run alone — but you lose control of it, and any setting you change at the display does not arrive.
The other ways LG prints this one
CO · Er CO · E CO
LG publishes a condition and then every string that can stand for it, and which one your machine shows depends on the panel it was built with — OE, E03 and E21 are one condition on a washer, and Er dS, F dS and r dS are one sensor on different evaporators. They are one page here, so whichever of them you searched for, this is the right page.
Where this appears, and why not to clear it
On the appliance's own display. LG reports errors two ways: machines with a digital display show a code, and the laundry machines without one blink their indicator lights instead. Both are published by the maker and both are on this site. Photograph what the panel shows before cutting the power. On a refrigerator you can also force the last code back onto the display by holding Freezer Temperature and Express Frz together for three seconds — LG documents that, and it is the one thing that makes a first visit more useful. A code that has been reset is information a technician no longer has.
What to do about it
- Cut the power at the wall for five minutes. A genuine communication drop-out often clears.
- Check whether the machine is still cooling. If it is, this is urgent but not an emergency.
- Note whether the display is blank or lit. A lit display that cannot change anything is the classic version.
- Book it. This one is not a homeowner repair — the harness runs inside the hinge.
Where this goes next
The job this usually becomes is appliance control board repair, and that page carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes, reminders and settings rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call (305) 419-0291 and describe what the panel is doing before booking anything.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards