Error Code Library
Updated
If the display reads OF OF, or the fridge lights up but never cools, it may be in demo or showroom mode. That is a setting rather than a fault, and you can usually turn it off yourself.
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A fridge that shows OF OF or OFF on its display is usually in demo mode, a showroom setting that keeps the lights on with the cooling switched off.
Showroom mode keeps the lights and display working while the cooling stays off. Samsung shows OF OF on the display when it is on. LG has a display or demo mode that some models show as OFF on the temperature readout.
Demo mode is often switched on by accident while cleaning the control panel, or left on from the store. LG Er CO is different: it means the main and display boards are not communicating, which needs service.
A fridge that cools again but later warms with a defrost code points to LG Er dH and GE dE defrost codes. A board or wiring fault needs refrigerator control board repair.
Samsung OF OF and LG display mode are settings you can turn off yourself, while LG Er CO is a real fault between the control boards.
| Brand | Code | Meaning | What to do |
|---|---|---|---|
| Samsung | OF OF | Demo or showroom mode on; cooling off | Reset and retry |
| LG | OFF / O FF | Display or demo mode on many models | Reset and retry |
| LG | Er CO | Communication fault between control boards | Stop and call |
| GE | Control lock | Panel locked; buttons will not respond | Reset and retry |
Codes are listed for identification. Meanings vary by model, so confirm the code in your owner’s manual.
Demo mode is one of the most common reasons a new or recently cleaned fridge stops cooling, and it costs nothing to fix. Each brand enters and exits it differently.
Samsung shows OF OF in the temperature display when showroom mode is on. Lights, fans and the display work, but the compressor stays off.
Many Samsung models exit with the top two buttons held for about ten seconds. Others use Energy Saver and Power Freeze together, so check the manual.
LG fridges in display mode often show OFF or O FF on the temperature readout. Holding Refrigerator and Ice Plus for about five seconds exits it on many models.
LG Er CO is not demo mode. It means the main control board and the display board are not communicating, often because of a loose connector in the door hinge wiring.
Exiting demo mode takes a button combination from the owner’s manual and restores cooling within about an hour.
A display code needs a technician when demo mode is off and the fridge still will not cool, or when Er CO appears. Call for service when:
Error Code FAQs
Display code questions are mostly about demo mode, a setting you can turn off without a technician.
OF OF means demo or showroom mode is on. The lights work but cooling is off. Turn it off with the button combination in your manual.
Demo mode is a common cause. If the display shows OF OF or OFF, leave demo mode first. If it does not, the fault is elsewhere and needs a technician.
Er CO means the main and display boards are not communicating. Unplug the fridge for a few minutes; if the code returns, call for service.
On many models, hold Refrigerator and Ice Plus together for about five seconds. Check your manual, since some models use a different pair.
Yes. Pressing buttons while wiping the panel can switch on demo mode by accident.
Tell the company what the display shows and how long cooling has been off.
Not affiliated with any brand
Brand names are trademarks of their owners and are used only to identify appliances. Appliance Repair North Carolina is not affiliated with, endorsed by or authorized by any appliance manufacturer. Error code meanings can change between models and production years, and not every code here has been checked against the manufacturer’s manual yet, so confirm a code in your owner’s manual before acting on it.
