Rheem R802VA07542117MSA Error Code A002_F: Blower Coefficient Configuration Error

What Does Code A002_F Mean?

Fault code A002_F on the Rheem R802VA means the Integrated Furnace Control (IFC) does not have a usable set of blower coefficients — the numeric values that tell the constant-CFM/PWM blower motor how to translate a requested airflow into an actual motor command for this specific furnace and duct setup. The R802VA is a two-stage, variable-speed furnace, so the board has to calculate a different motor command for low stage, high stage, and continuous fan, and it can only do that using these stored coefficients. Without them, the control has no basis for commanding the motor correctly and locks out rather than guess.

Because the Bluetooth Communicating IFC is a generic control programmed for each installation rather than a pre-set board, blower coefficients are written the same way model data is — a technician connects with Rheem's contractor app and pushes the correct values. This step is usually bundled with model data programming right after a control board replacement, but it can also need to happen on its own after a blower motor replacement, since a new motor may require its own coefficient set rather than reusing the old one.

A002_F is the blower-side counterpart to A001_F, Model Data Configuration Error, which covers the furnace's identity data such as cabinet size and staging behavior rather than blower motor commands. A board replacement commonly leaves both unwritten at the same time, which is why A001_F and A002_F are often reported together rather than in isolation.

A power cycle or thermostat reset does not restore blower coefficients, because the board cannot derive them on its own — they have to be supplied through the same Bluetooth programming step that was skipped or interrupted the first time.

What You'll Notice

• The blower does not run, or runs erratically, when the thermostat calls for heat or continuous fan
• The alphanumeric display shows A002_F
• The fault appears shortly after a control board or blower motor replacement
• A heating cycle stalls partway because the control cannot verify correct airflow before proceeding
• The code persists through a power cycle or thermostat reset

Common Causes

How This Is Diagnosed

A technician connects to the IFC with the Rheem contractor app over Bluetooth to check whether blower coefficient data is present, missing, or a stale set left from a different motor. If a blower motor was recently replaced, the technician confirms the coefficient set matches the specific motor now installed, since coefficients are matched to that motor rather than universal across replacement parts.

If coefficients were already written and the fault came back, the technician looks for anything that could have interrupted that Bluetooth session — the same kind of check used for A001_F — and repeats the write with the correct file. If a clean write does not resolve the fault, that points toward a hardware problem on the IFC rather than a missing configuration.

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 blower will not run correctly and the display shows A002_F
• A control board or blower motor was recently replaced and the furnace has not run normally since
• The fault returns after blower coefficients were supposedly already programmed
• Power cycling the furnace has no effect on the code

✓ Verified against manufacturer service manual — March 2026