Amana AMVM970803BN Error Code Eb1: Lost Communications with Circulator Blower Motor
What Does Code Eb1 Mean?
Error code Eb1 on the Amana AMVM970803BN means the integrated control module has lost its digital communication link with the circulator blower motor. This ECM motor communicates with the control module over a dedicated communication bus, and when that communication is interrupted, the furnace shuts down completely.
Unlike Eb0, which indicates the motor is not running, Eb1 specifically identifies a communication failure. This can be caused by a loose or damaged connector in the communication wiring between the control module and the blower motor, internal failure of the blower motor's onboard electronics, or a fault within the integrated control module itself.
A technician will need to inspect and tighten the wiring connections between the control module and blower motor, then test the motor to determine if it has failed. If the wiring is intact and the motor tests normally, the control module itself may need replacement.
Common Causes
When to Call a Professional
Contact a licensed HVAC technician if:
- Eb1 displays and the furnace will not operate — communication fault diagnosis requires a trained HVAC technician
- If wiring connections are intact and the motor appears undamaged, the blower motor or control module may need replacement
- Replacing either the ECM blower motor or the integrated control module requires professional service
✓ Verified against manufacturer service manual — March 2026