Amana AMVC960803BN Error Code Eb2: Blower Motor HP/ID Mismatch
What Does Code Eb2 Mean?
The Amana AMVC960803BN drives its variable-speed ECM circulator using a shared data set stored on the integrated control module. That data set defines the motor horsepower this specific furnace model was built with, along with the airflow tables the board uses to command the motor. Eb2 is set when the motor reports a horsepower rating through its self-identification that does not match the horsepower the shared data set expects. Because the board cannot correctly calculate or safely command airflow against a motor it does not recognize, the furnace will not operate.
There are two directions this mismatch can come from. The wrong motor may be physically installed — for example, a replacement ECM motor of a different HP than the model was designed for was ordered or fitted. Or the correct motor may be in place while the control board carries the wrong shared data set, typically because a board was replaced and programmed from a memory card intended for a different model.
This makes Eb2 a member of the same shared-data and configuration family as the memory-card codes. Ed0 (no shared data on the board) and Ed1 / Ed4 / Ed6 (invalid or unrecognized memory-card data) all concern the data that must be loaded onto the control, and Eb7 (incomplete parameters sent to motor) concerns the motor not receiving a complete usable data set to run on. Eb2 specifically compares one field in that data — motor horsepower — against the real motor. A technician resolves it by verifying which side is wrong: confirming the installed motor is the correct HP for this model, and confirming the board was programmed from the memory card for the AMVC960803BN.
What You'll Notice
- The furnace will not run and delivers no airflow after a recent motor or control-board replacement
- The dual 7-segment display reads Eb2
- The blower never starts even though the rest of the sequence appears normal
- The problem appeared immediately after a repair rather than developing gradually
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Wrong motor installed (incorrect horsepower for this model) | Most common | ✗ Call a pro → |
| Incorrect shared data programmed for this model | Most common | ✗ Call a pro → |
How This Is Diagnosed
A technician first checks the physical motor against the model's specification, reading the horsepower on the motor label and confirming it is the correct replacement part for the AMVC960803BN. If the wrong HP motor is installed, it must be swapped for the specified part.
If the motor is correct, attention turns to the shared data set on the control board. The technician verifies the board was programmed with the memory card for this exact model and re-loads the correct data if it was not. Because Eb2 almost always follows a motor or board replacement, isolating which component carries the wrong information is the core of the diagnosis. This is professional parts-and-programming work, presented here for information only.
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:
- Eb2 appeared right after a blower motor or control-board replacement
- The motor horsepower on the label may not match the part specified for this model
- A replacement control board may have been programmed from the wrong memory card
- The furnace delivers no airflow and the code will not clear on a power cycle
Frequently Asked Questions
Why did Eb2 show up right after a repair?
Eb2 almost always follows a motor or control-board replacement. It means the installed motor's horsepower and the horsepower stored in the board's configuration data no longer agree, which is why it rarely appears on a furnace that has not been serviced.
Can I clear Eb2 by resetting the furnace?
No. A power cycle will not fix a horsepower mismatch. Either the correct motor must be installed or the correct shared data must be loaded onto the board — both are technician tasks.
How does the furnace know the wrong motor is installed?
The ECM motor self-identifies to the control board, which compares that identity against the horsepower stored in its shared data set. When the two disagree, the board sets Eb2 rather than risk commanding a motor it cannot properly control.
Sources
✓ Verified against manufacturer service manual — March 2026