Rheem R802VA07542117MSA Error Code A001_F: Model Data Configuration Error

What Does Code A001_F Mean?

Fault code A001_F on the Rheem R802VA means the Integrated Furnace Control (IFC) does not have a usable model data record. Unlike furnace boards that ship pre-configured for one model, this Bluetooth Communicating IFC is a generic control that must be told which furnace it is installed in — its cabinet size, gas type, staging behavior, and safety limits — by a technician using Rheem's contractor app over Bluetooth. Until that data is written and accepted, the board treats itself as unconfigured and refuses to fire.

This design is why A001_F shows up almost exclusively after service work rather than during normal operation. A brand-new or replacement IFC arrives blank, and the model data step is a separate action the installer has to complete — it is not automatic just because the board is wired in and powered up. If that Bluetooth session is skipped, interrupted by a dropped connection, or ends before the write finishes, the board is left with no data or a partial, unusable record and reports A001_F.

A001_F is closely related to A222_F, Model Data Restore Failure. Where A001_F means no valid model data has ever been successfully written, A222_F means the board previously had valid model data stored and then failed to reload it from memory — for example after a power interruption or a memory fault. Both leave the furnace unable to identify itself to its own control logic, but the underlying failure point (never programmed vs. corrupted after being programmed) is different, which matters to a technician deciding whether to reprogram the board or replace it.

Because writing model data requires the Rheem contractor app, a paired Bluetooth connection, and the correct model file for this exact R802VA build, there is no homeowner-side workaround. Power cycling the furnace does not resolve A001_F, since the missing configuration is not something the board can recover on its own.

What You'll Notice

• The furnace does not start a heating cycle at all, even though the thermostat is calling for heat
• The alphanumeric display shows A001_F instead of a normal status or standby indication
• The blower and igniter never activate because the control will not proceed past its startup checks
• The fault appears immediately after a control board was recently replaced or serviced
• Attempting a thermostat reset or power cycle does not clear the code

Common Causes

How This Is Diagnosed

A technician connects to the IFC with the Rheem contractor app over Bluetooth and checks whether the board reports any model data at all, or a partial/invalid record. If this is a new or replacement board, the technician confirms the correct model file for the R802VA07542117MSA is selected before writing it, since selecting the wrong model file would leave the furnace misconfigured even after the fault clears.

If model data was written previously and the fault reappeared, the technician checks for anything that could have interrupted the original Bluetooth session — a dropped pairing, low phone battery, or app closing mid-write — and repeats the programming step. If the board still will not accept valid model data after a clean write attempt, that points to a hardware fault on the IFC itself rather than a configuration issue.

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 display shows A001_F and the furnace will not begin a heating cycle
• A control board was recently installed or serviced and the furnace has never run correctly since
• The fault returns after model data was supposedly already programmed
• Power cycling or resetting the thermostat has no effect on the code

✓ Verified against manufacturer service manual — March 2026