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Kenmore·Refrigeratorhigh severity
Kenmore Refrigerator Error Code Er CO
Communication error
Common Causes
- 1Wiring harness between boards failed
- 2Main control board failure
- 3Display board failure
Step-by-Step Troubleshooting
- 1
Power cycle at breaker for 5 minutes — Er CO can clear after reset
- 2
Inspect ribbon cable between display board (door) and main board (rear)
- 3
Check door hinge wire harness for pinched or frayed wires
- 4
Reseat all board connectors firmly and test
Pro Diagnostic Tip
This 795-prefix LG-built Kenmore runs its display data through a harness that threads the top door hinge, and thousands of door swings work-harden and crack those conductors. Flex the hinge bundle by hand while watching the panel — if the display flickers or drops out as you move it, replace that harness before either board.
You Might Also Notice
- •A blank or garbled display
- •No response when you adjust the temperature
- •The unit cooling but ignoring every setting
Parts, Cost & Difficulty
Repair Difficulty
Hard — Advanced Skills RequiredEstimated Repair Cost
$175–$400
Parts + labor. Free diagnosis with repair.
Parts That May Need Replacement
EBR73093617 main control board (LG platform)EBR75234703 display board
Do You Have the Right Tools?
Refrigerant gauges ($200+), vacuum pump ($250), leak detector ($150), and EPA-certified recovery equipment. Our technician arrives with $3,000+ in professional tools — your diagnostic is free.
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Refrigerant (R-134a/R-600a) requires EPA certification to handle. Improper discharge is a federal violation and health hazard. Our techs are licensed and insured — let them handle the risk.
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Get Professional Help Now
Error code Er CO is a high-severity issue that can cause further damage to your refrigerator if left unresolved. A licensed technician can diagnose and fix it the same day.
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Frequently Asked Questions
What does Kenmore error code Er CO mean?
Kenmore error code Er CO indicates: Communication error. This is a high-severity issue affecting your refrigerator.
How do I fix Kenmore error code Er CO?
Power cycle at breaker for 5 minutes — Er CO can clear after reset Then, Inspect ribbon cable between display board (door) and main board (rear) Then, Check door hinge wire harness for pinched or frayed wires There are 1 more steps — see the full troubleshooting guide above. This repair typically requires professional tools and expertise.
How do I know if my refrigerator has error Er CO?
Besides the error code on the display, common signs include: A blank or garbled display; No response when you adjust the temperature; The unit cooling but ignoring every setting. If you notice any of these symptoms, check your refrigerator's display panel for error code Er CO.
How much does it cost to fix Kenmore Er CO?
Repair costs for Kenmore Er CO typically range from $175 to $400 depending on the specific cause and parts needed. EasyBear offers free diagnosis when you proceed with the repair. Call (415) 795-7300 for a same-day appointment.
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