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The top edge of a French door refrigerator where the doors meet the cabinet, the hinge cover and the neat run where the door wiring passes, stainless and clean.

LG refrigerator
showing ER CO

The main board and the display board cannot communicate.

(844) 681-4650

Mon–Sat, 8am–8pm

  • Communication
  • Controls and sensors
  • Source: LG

Book a visit

Three short steps, about a minute.

or call (844) 681-4650

What ER CO
actually means.

The main board and the display board cannot communicate. LG gives three kinds of cause: a failed board, a loose wire between the two, or a brief problem with the power supply.

LG refrigerator display · also shown as E CO, CO

What to do when ER CO shows on the refrigerator

Kind of codeCommunication

Two boards that stopped hearing each other — the main control and the display, or the inverter. A harness is checked before a board.

Usually leads toControls and sensors

A refrigerator cools to what it believes the temperature is, and a sensor reading wrong is obeyed perfectly.

Shows up asRefrigerator Control Panel Not Responding

Buttons do nothing, the display is blank or frozen, or settings will not hold.

MakeLG

French door refrigeration with linear compressors and heavily instrumented controls.

SourceLG US support: E CO error code

Shown as ER CO or E CO depending on the model.

Before you book,
in this order.

Each step comes from LG's own guidance for ER CO on its refrigerators. Follow it to the end: the last card says whether this is a visit.

01

Cut the power for about five minutes, then switch it back on.

02

Note whether there was an outage or a surge recently.

03

If the same code keeps returning, book a visit.

Still there?

It usually turns into controls and sensors. Book with the code and the model number.

What not to do

Do not order a board before the harness between the two boards has been checked. A loose connection gives the same code.

What you may
notice with it.

The refrigerator problem ER CO tends to arrive with. Answer these at the refrigerator before anyone is booked.

All problems

Before you call

Refrigerator Control Panel Not Responding

All 5 causes, cheapest first
A finger pressing an unlit, completely blank touch control panel on the front of a refrigerator door. Problem

Refrigerator Control Panel Not Responding

5 causes, cheapest first

Where ER CO usually leads

Controls and sensors.

Control board · moderate.
Book a visit What the job involves

Read these
before the visit.

Short guides that make the call quicker and the diagnosis cheaper.

All guides
What you can check yourself

Five observations that narrow a refrigerator problem down before anyone visits

 What you can check yourself

Where the model number hides, and why nothing works without it

 Error codes

All 247 codes, by make

LG
refrigerators.

French door refrigeration with linear compressors and heavily instrumented controls.

LG refrigerator repair

More LG codes

dHER IFER FFER rFOF FER rSCFFSdSrTSbC1
All 14 LG codes

Communication on other makes

Samsung PC ERFrigidaire SY CEElectrolux SY CEBosch E02U-Line No CommTrue Residential Communication ErrorBertazzoni E6ASKO E0
All 18 codes of this kind
A French door refrigerator with both upper doors swung open and the lower freezer drawer pulled out. LG builds this

French door refrigerator

Two fresh-food doors over a freezer drawer — the most common premium layout, and the one with the most to go wrong at the door line.

 A side-by-side refrigerator with a tall freezer door on the left carrying an ice and water dispenser recess. LG builds this

Side-by-side refrigerator

Full-height freezer beside full-height fresh food, with the ice maker and dispenser built into the freezer door.

In LG's own words

A CO appears on the display if the communication between the main board and the display PCB is not available.
LG US support: E CO error code

Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Shown as ER CO or E CO depending on the model.

LG ER CO refrigerator repair,
where we come out.

The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered.

All service areas

Tampa BayFL · 31 areas

OrlandoFL · 30 areas

Miami / South FloridaFL · 47 areas

New York MetroNY · 75 areas

HoustonTX · 36 areas

ChicagoIL · 50 areas

Los AngelesCA · 95 areas

San DiegoCA · 31 areas

San Francisco Bay AreaCA · 74 areas

A family preparing a meal together in their kitchen
For the heart of your home.

Questions
about ER CO.

Can I clear ER CO myself?
Cut the power for about five minutes, then switch it back on. If it comes back, it needs a visit.
Can a power blip cause ER CO on my LG refrigerator?
Yes, LG lists a brief supply problem as one of the causes, alongside a loose wire and a failed board. A five-minute power cut is the owner step; note any recent outage for the technician.
Which part is usually behind a repeat ER CO on an LG?
The code only says the main board and the display board are not talking, so the link between them is checked before any board is ordered. A harness that has worked loose looks identical on the display.

Back to your everyday

Still showing ER CO?

Book with the exact characters, the full model number, and whether it is still cooling — on a code, that is the whole starting point.

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