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Error code reference

Maytag Refrigerator Error Code dP

Damper motor output fault detected during service mode diagnostics.

Maytag codesMaytag refrigerator codes

Damper motor output fault detected during service mode diagnostics.

First step from the service manual

Enter Service Mode Option 1 to display error codes; check damper motor circuit.

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

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What dP means on a Maytag refrigerator

The dP error code on a Maytag refrigerator indicates a damper motor output fault detected during service mode diagnostics. The damper motor controls the air damper assembly, which regulates airflow between the freezer compartment and the fresh food compartment. When the control board sends a signal to the damper motor and does not receive the expected response or detects an abnormal output condition, it logs the dP fault. This fault is specifically captured and displayed through Service Mode Option 1, which cycles through stored error codes for technician review.

The damper itself is an electrically actuated door or flap that opens and closes to maintain target temperatures in both compartments. If the damper motor is stalled, disconnected, or receiving incorrect voltage, the control board flags the output as faulty. Wiring harness issues between the control board and the damper motor assembly are a frequent contributor, as are failed motor windings within the damper unit itself. In some cases, a mechanically obstructed damper door can overload the motor circuit and trigger the fault even if the motor is otherwise functional.

Diagnosing this code requires entering Service Mode Option 1 to confirm the dP fault is actively stored, then physically inspecting and testing the damper motor circuit. This includes checking the wiring harness for continuity, inspecting connector pins for corrosion or damage, and verifying that the damper assembly moves freely without obstruction. If wiring checks out, the damper motor assembly itself should be tested for proper resistance values and replaced if it fails to meet specifications.

Source: manufacturer service documentation.

Common causes of dP

  1. 01

    Failed damper motor

    Part replacement

    The motor inside the damper assembly can fail due to burned windings or mechanical wear, preventing the control board from detecting the expected output. Testing the motor for proper resistance and response to control signals will confirm this failure.

  2. 02

    Wiring harness damage or disconnection

    Wiring / connection

    The wiring between the control board and the damper motor can become frayed, broken, or disconnected, causing an open or short circuit in the damper motor output. Inspect the full length of the harness and all connector pins for corrosion, damage, or loose fit.

  3. 03

    Obstructed damper door

    Wiring / connection

    Ice buildup or debris lodged in the damper assembly can physically block the damper door, stalling the motor and overloading the output circuit. Inspect the damper housing for ice accumulation or any foreign material restricting movement.

  4. 04

    Faulty main control board

    Part replacement

    If the control board itself has a damaged output relay or driver circuit for the damper motor, it may incorrectly flag a dP fault even when the motor and wiring are intact. This is typically diagnosed after ruling out the motor and harness.

  5. 05

    Corroded or damaged connector pins

    Wiring / connection

    Moisture intrusion at the damper motor connector can cause corrosion on the pins, creating high resistance or intermittent loss of connection in the motor circuit. Inspect the connector carefully and clean or replace as needed.

See the test procedure for each cause

Frequently asked questions about dP

What does dP mean on a Maytag refrigerator?
The dP code on a Maytag refrigerator indicates a damper motor output fault detected during service mode diagnostics. The damper motor controls airflow between the freezer and fresh food compartments, and the control board has detected an abnormal or missing output signal from that motor. This code is retrieved by entering Service Mode Option 1, which displays stored error codes for diagnostic review.
Can I fix the dP error code myself?
Some causes of the dP code, such as a disconnected wiring harness plug or ice buildup blocking the damper door, can be addressed without replacing parts. However, diagnosing the fault accurately requires entering the refrigerator service mode and testing the damper motor circuit, which is best performed by someone familiar with appliance diagnostics. If the motor or control board needs replacement, those repairs typically require purchasing parts and some disassembly of the refrigerator.
Is it safe to keep using my refrigerator with the dP error code?
A dP fault means the refrigerator may not be regulating airflow correctly between compartments, which can cause temperature inconsistencies in the fresh food or freezer sections. Food safety could be at risk if temperatures rise above safe storage levels. It is advisable to check compartment temperatures with a thermometer and address the fault promptly rather than continuing to operate the refrigerator indefinitely without repair.
How much does it cost to repair a dP error code on a Maytag refrigerator?
Repair costs vary depending on the root cause. A wiring harness repair or connector cleaning might involve only a service call fee, typically in the range of $75 to $150. Replacing the damper motor assembly generally costs between $150 and $300 including parts and labor, while a main control board replacement can range from $200 to $400 or more depending on the specific model and local labor rates.
Will resetting my Maytag refrigerator clear the dP error code?
Performing a power reset by unplugging the refrigerator may temporarily clear the dP code from the display, but if the underlying fault in the damper motor circuit is still present, the code will return. The proper way to confirm the fault and clear it is to address the root cause, then verify the repair using Service Mode Option 1 to check that the code no longer appears.

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