mypros+
Error code reference

Frigidaire Refrigerator Error Code E6

Communication fault between main control board and display control board.

Frigidaire codesFrigidaire refrigerator codes

Communication fault between main control board and display control board.

First step from the service manual

Check whether terminal CN8 of the main control board is connected properly or not, pull out the terminal and re-connect in place. Clean if any foreign particles trapped inside the terminal.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for E6.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What E6 means on a Frigidaire refrigerator

The E6 error code on a Frigidaire refrigerator indicates a communication fault between the main control board and the display control board. These two boards exchange data signals continuously to coordinate refrigerator functions including temperature regulation, compressor cycling, and user interface feedback. When the communication link between them breaks down or becomes unreliable, the main control board detects the failure and triggers the E6 code to alert the user and technician.

The most common entry point for diagnosing this fault is terminal CN8 on the main control board, which is the dedicated connector responsible for the communication signal path between the two boards. A loose, corroded, or contaminated connection at CN8 can interrupt the data signal entirely or cause intermittent dropouts that register as a fault. Foreign particles such as dust, debris, or moisture residue inside the terminal can increase resistance in the circuit and prevent reliable signal transmission.

Beyond connector issues, the fault can also stem from damage to the wiring harness running between the two boards, or from a failure in one of the boards themselves. If reseating and cleaning terminal CN8 does not resolve the error, the harness should be inspected for pinched, frayed, or broken wires. If the wiring checks out, either the display control board or the main control board may need to be tested or replaced to restore communication.

Source: manufacturer service documentation.

Common causes of E6

  1. 01

    Loose or disconnected CN8 terminal

    Wiring / connection

    The CN8 connector on the main control board may have worked loose over time due to vibration. Pulling the terminal out and firmly reseating it is the first and most likely fix.

  2. 02

    Contaminated connector terminal

    Wiring / connection

    Dust, grease, or moisture residue inside the CN8 terminal can degrade the electrical contact and block the communication signal. Cleaning the terminal carefully before reseating it often restores the connection.

  3. 03

    Damaged wiring harness between boards

    Part replacement

    The harness connecting the main control board to the display board may have a pinched, frayed, or broken wire. Visually inspect the full length of the harness for any signs of damage or wear.

  4. 04

    Failed display control board

    Part replacement

    If the wiring and connectors are intact, the display control board itself may have failed and can no longer send or receive communication signals. Board failure typically requires replacement.

  5. 05

    Failed main control board

    Part replacement

    In cases where all wiring and the display board check out, the main control board may be the source of the fault, unable to maintain the communication link through CN8. This is the least common cause but requires board replacement.

See the test procedure for each cause

Frequently asked questions about E6

What does E6 mean on a Frigidaire refrigerator?
The E6 code signals a communication fault between the main control board and the display control board. The two boards are unable to exchange data signals properly, which triggers this alert. The issue often originates at terminal CN8 on the main control board, where a loose or contaminated connection interrupts the signal.
How do I fix the E6 error on my Frigidaire refrigerator?
Start by locating terminal CN8 on the main control board, pulling it out, and firmly reconnecting it. Clean out any dust or debris inside the terminal before reseating it. If the error returns, inspect the wiring harness between the two boards for damage. If the harness is intact, one of the two control boards may need to be replaced.
Will resetting my Frigidaire refrigerator clear the E6 error?
A reset may temporarily clear the E6 code, but if the underlying connection problem at CN8 or the wiring harness is not addressed, the error will return. Clearing the code without fixing the root cause does not restore reliable communication between the boards. Always inspect and reseat the terminal before relying on a reset.
Is the E6 error on a Frigidaire refrigerator a safety concern?
The E6 fault itself is not a direct safety hazard, but it does mean the two control boards are not communicating properly, which can affect temperature control and other refrigerator functions. Food safety could become a concern if the fault prevents the compressor or cooling system from operating correctly. It is best to diagnose and resolve the error promptly.
How much does it cost to repair a Frigidaire refrigerator E6 error?
If the fix is simply reseating and cleaning the CN8 terminal, the repair cost may be limited to a service call fee, typically in the range of $75 to $150. If the wiring harness needs replacement, parts and labor could range from $100 to $250. Replacing a failed control board generally runs between $150 and $400 depending on the board and labor costs in your area.

Related Frigidaire refrigerator codes

All Frigidaire refrigerator codes
View all 100 Frigidaire refrigerator codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass