Rheem R96VA0702317MSA Error Code d1: No Model Data

What Does Code d1 Mean?

Code d1 (No Model Data) is a critical fault on the Rheem R96V Integrated Furnace Control (IFC). The IFC does not, on its own, contain the airflow tables, blower profiles, and configuration values that tell it how to run this specific furnace — that information lives on a small electronic model-data card (often called the memory card) that plugs into connector P6 on the control board. When the IFC can find no valid model data from that card and none on the communicating network either, it posts d1 and refuses to operate in any mode.

Because the model data defines blower operation for this variable-speed ECM furnace, running without it is not possible, so d1 is a full shutdown: no heating, no cooling, and no fan. This sets it apart from the related standby codes on the same board. Code d4 (No Valid Model Data on Memory Card) appears when the card is bad or absent but a valid copy of the data still resides in the furnace microprocessor, so the furnace keeps running and only flags the issue in standby. Code d6 (Horsepower Conflict on Memory Card) likewise lets the furnace run on the microprocessor's data. d1 is the more severe case where no usable data exists at all, so nothing runs.

The most common trigger is a control board or IFC replacement in which the original card was not moved over to the new board, or was lost. A missing card by itself will show d4 instead of d1 when model data is still available on the network, so seeing d1 specifically points to model data being unavailable from every source. A corrupted card that also lacks any valid backup data can produce the same dead condition.

Recovering from d1 means restoring valid model data. A technician either locates and reinstalls the furnace's original card at P6 or orders the correct replacement card for this exact model (Rheem sources these through ProStock). Fitting a card from a different furnace will not correctly resolve the fault and can lead to other mismatches such as code d6.

What You'll Notice

• The furnace is completely dead — no heat, no cooling, and no blower on any thermostat call
• The IFC dual 7-segment display shows d1 continuously
• The problem started right after a control board or IFC replacement or other board service
• The blower motor never spins up even when you switch the system to fan-only
• You can see an empty slot at connector P6 on the control board where the small model-data card should be plugged in

Common Causes

How This Is Diagnosed

A technician first inspects connector P6 on the IFC to see whether the model-data card is present and fully seated. If the card is missing, they determine whether valid model data exists anywhere else — a missing card with data still on the communicating network would post d4 instead, so a true d1 indicates no usable data from any source. If a card is present, it is checked for corruption or for being the wrong card from another furnace. The fix is to reinstall the furnace's original card, or order and install the correct replacement card for this specific model, before power is restored and the code cleared.

When to Call a Professional

This code involves components that are not homeowner-serviceable, so have a licensed HVAC technician diagnose and repair it. Keep in mind:

• The furnace went completely dead and shows d1 right after a control board or IFC was replaced
• No mode — heating, cooling, or fan — will start and the display stays on d1
• The model-data card is missing from connector P6 and no correct replacement is on hand
• A card is installed at P6 but d1 persists, suggesting a corrupted card or one that does not match this furnace

✓ Verified against manufacturer service manual — March 2026