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Error code reference

Goodman Heat Pump Error Code d1

Invalid data on network

Goodman codesGoodman heat pump codes

Invalid data on network - integrated control module contains invalid shared data or network data is invalid.

First step from the service manual

Verify system type. Populate correct shared data using memory card. Wire system as legacy system.

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

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What d1 means on a Goodman heat pump

The D1 error code on a Goodman heat pump indicates that the integrated control module has detected invalid or missing shared data on the system network. The integrated control module relies on shared data stored in its memory to correctly identify and operate within the specific system configuration. When this data is absent, corrupted, or does not match the expected system type, the module flags the D1 fault and may be unable to operate the system properly.

This error most commonly surfaces after a control board replacement, a failed firmware or data programming event, or when a control module is installed in a system it was not originally configured for. Goodman heat pump systems use a memory card to populate the correct shared data into the integrated control module. If that programming step was skipped or the memory card transfer was incomplete, the module will not have the configuration data it needs to recognize the system architecture and communicate correctly over the network.

The first diagnostic step is to verify the system type to confirm which configuration data is required. The correct shared data must then be loaded onto the integrated control module using the appropriate memory card for that system. If the memory card is unavailable or the network data cannot be validated, the system can alternatively be wired as a legacy system, which bypasses the network data requirement and allows basic operation to resume. Technicians should confirm all wiring is correct before attempting either remedy.

Source: manufacturer service documentation.

Common causes of d1

  1. 01

    Control module replaced without reprogramming

    Wiring / connection

    When a new integrated control module is installed, it does not automatically contain the shared data for the specific system. The memory card must be used to populate the correct configuration data before the system will recognize the network as valid.

  2. 02

    Incomplete or failed memory card data transfer

    Wiring / connection

    If the memory card programming process was interrupted or did not complete successfully, the control module may contain partial or corrupted shared data, which triggers the D1 fault. The data transfer should be repeated using the correct memory card for the system type.

  3. 03

    Incorrect system type configuration

    Wiring / connection

    If the shared data loaded onto the control module does not match the actual system type installed, the network data will be flagged as invalid. Verifying the system type and reloading the appropriate data set resolves this mismatch.

  4. 04

    Missing or damaged memory card

    Part replacement

    If the memory card required to program the integrated control module is lost or physically damaged, the correct shared data cannot be loaded. A replacement memory card specific to the system type would be needed.

  5. 05

    Faulty or failed integrated control module

    Part replacement

    In some cases, the control module itself may be unable to retain or read shared data due to an internal failure. If reprogramming does not resolve the D1 code, the control module may need to be replaced.

See the test procedure for each cause

Frequently asked questions about d1

What does d1 mean on a Goodman heat_pump?
The D1 code means the integrated control module has invalid or missing shared data on the system network. This prevents the module from correctly identifying the system configuration it is installed in. It most often occurs after a control board replacement or when the board was not properly programmed using the memory card. The system can also be wired as a legacy system as an alternative resolution.
How do I fix a D1 error on my Goodman heat pump?
Start by confirming the system type, then use the correct memory card to load the proper shared data onto the integrated control module. If the memory card is unavailable or the network data still cannot be validated after programming, wiring the system as a legacy system is the recommended alternative. If neither step resolves the issue, the control module itself may need to be inspected or replaced.
Will resetting my Goodman heat pump clear the D1 error code?
A simple power reset is unlikely to clear the D1 error because the fault is caused by missing or invalid configuration data stored in the control module, not a temporary communication glitch. The underlying data problem must be corrected by reprogramming the module with the appropriate memory card or by wiring the system as a legacy system. Resetting without addressing the root cause will typically result in the code returning immediately.
Is it safe to run my Goodman heat pump while the D1 code is active?
A D1 error indicates the control module cannot confirm a valid system configuration, which means the unit may not operate correctly or at all in its current state. Running the system under these conditions could lead to improper operation or component stress. It is best to have the issue diagnosed and resolved by a qualified technician before attempting to run the system for extended periods.
How much does it cost to repair a Goodman heat pump D1 error?
If the fix involves only reprogramming the control module with the memory card or rewiring as a legacy system, labor costs are typically the primary expense, often ranging from around 75 to 200 dollars depending on the technician and region. If a replacement memory card is needed, that adds a modest parts cost. If the integrated control module itself has failed and requires replacement, total repair costs including parts and labor can range from approximately 300 to 700 dollars or more depending on the specific unit.

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