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Error code reference

Maytag Refrigerator Error Code CL

Communication link lost between high volt board and low volt board.

Maytag codesMaytag refrigerator codes

Communication link lost between high volt board and low volt board.

First step from the service manual

Check wiring and connectors between high volt and low volt boards; verify voltage at JP4 and JP5 connectors.

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

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What CL means on a Maytag refrigerator

The CL error code on a Maytag refrigerator indicates that the communication link between the high voltage control board and the low voltage control board has been lost. These two boards work together to manage the refrigerator's major systems: the high volt board handles power distribution to compressors, fans, and defrost heaters, while the low volt board manages control logic, user interface, and sensor data. When the serial communication signal between them is interrupted or absent, the unit cannot coordinate these functions and triggers the CL fault.

The most direct diagnostic path involves inspecting the wiring harness and connectors that run between the two boards, specifically the JP4 and JP5 connector points. A break, loose pin, corroded terminal, or damaged wire in this communication circuit will prevent the signal from passing between boards. Voltage verification at JP4 and JP5 confirms whether the communication supply is present and within spec, helping to isolate whether the fault is wiring-related or points to a failed board.

In some cases, the fault is caused by a failed high volt or low volt board rather than a wiring problem. Board failures can result from power surges, moisture intrusion, or component degradation over time. Before condemning either board, a thorough inspection of the interconnecting harness should be completed, since wiring faults are more common and less expensive to correct than full board replacements.

Source: manufacturer service documentation.

Common causes of CL

  1. 01

    Loose or disconnected wiring harness

    Wiring / connection

    The connectors at JP4 or JP5 between the high volt and low volt boards may have worked loose over time due to vibration. Inspect both connectors for secure seating and check for any pins that have backed out of the housing.

  2. 02

    Corroded or damaged connector terminals

    Part replacement

    Moisture or age can cause corrosion on the JP4 and JP5 connector pins, creating high resistance in the communication circuit. Look for green or white oxidation on the terminals and clean or replace the connectors as needed.

  3. 03

    Damaged wiring harness

    Part replacement

    A wire in the harness between the two boards may be broken, pinched, or chafed through insulation. Trace the full length of the harness between the boards and check for any visible damage or continuity breaks.

  4. 04

    Failed low voltage control board

    Part replacement

    If wiring and connectors check out correctly and voltage at JP4 and JP5 is absent or abnormal, the low volt board itself may have failed. Board failures can be caused by power surges or component aging.

  5. 05

    Failed high voltage control board

    Part replacement

    The high volt board may have failed and is no longer generating or transmitting the communication signal to the low volt board. This is typically diagnosed after confirming that wiring and the low volt board are functioning correctly.

See the test procedure for each cause

Frequently asked questions about CL

What does CL mean on a Maytag refrigerator?
The CL code means the refrigerator has detected a lost communication link between the high voltage control board and the low voltage control board. These two boards must exchange signals to coordinate cooling, defrost, and fan operation. When that communication is interrupted, the unit faults out and displays CL. The cause can range from a loose connector to a failed control board.
Can I fix the CL error code myself?
Some causes of the CL code are DIY-friendly. Checking and reseating the wiring connectors at JP4 and JP5 between the two control boards requires only basic tools and no special equipment. However, verifying voltage at those connectors and diagnosing a failed control board requires a multimeter and comfort working around appliance electronics. If you are not confident working near electrical components, a technician should perform the diagnosis.
Is it safe to keep using my refrigerator when the CL code is showing?
A CL fault means the two main control boards are not communicating, which can prevent the refrigerator from maintaining proper temperatures. Food safety could be at risk if the cooling system is not operating correctly. It is best to check the refrigerator's internal temperature and avoid leaving perishables inside until the fault is resolved.
Will resetting the refrigerator clear the CL error code?
A reset, such as unplugging the unit for a few minutes, may temporarily clear the CL code, but it will return if the underlying wiring or board problem has not been fixed. A reset is a reasonable first step to rule out a transient fault, but a persistent CL code requires a physical inspection of the connectors and wiring between the two boards.
How much does it cost to repair a Maytag refrigerator showing a CL code?
Repair costs depend on the root cause. If only a connector or wiring harness repair is needed, costs are typically in the range of $75 to $200 including labor. If a control board replacement is required, costs can range from $150 to $450 or more depending on the specific board and labor rates in your area. Getting a diagnosis before committing to a repair is recommended.

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