Amana AMVM970803BN Error Code Eb5: Circulator Blower Motor Failure
What Does Code Eb5 Mean?
Code Eb5 is a hard blower-motor failure. The variable-speed circulator on the AMVM970803BN either failed to start 10 consecutive times, shut down because incoming voltage was too high or too low, or overheated at its power module. In every case the furnace can no longer move air and stops.
An obstructed blower wheel or a jammed shaft can prevent startup, and an out-of-range supply voltage can trip the motor's protection. But repeated start failures usually point to the motor or its electronics being at the end of their life.
Eb5 is the most severe of the mechanical blower codes: Eb3 and Eb9 are airflow limits, Eb4 is loss of rotor control, and Eb5 is outright failure to run. Its voltage-related causes also overlap with whole-house electrical faults such as EEA (reversed polarity) and E10 (grounding fault).
What You'll Notice
- The blower does not start at all and the display shows Eb5
- You may hear the motor attempt to start and stop repeatedly
- The blower wheel may be visibly obstructed or hard to turn by hand (power off)
- Lights elsewhere in the home may dim or flicker if supply voltage is unstable
Common Causes
How This Is Diagnosed
A technician checks the blower for obstructions and confirms the wheel and shaft rotate freely, then measures the supply voltage to the furnace against the nameplate range to rule out an over- or under-voltage condition. They also check for signs of an over-temperature shutdown at the motor's power module.
If the mechanical path is clear and voltage is in range but the motor still will not start after repeated attempts, the motor or its integrated electronics are replaced.
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 start and the display shows Eb5
- You hear repeated failed start attempts from the motor
- Household lights flicker, suggesting a voltage supply problem
- The blower wheel is jammed or obstructed
Frequently Asked Questions
Is Eb5 always a dead motor?
Not always — an obstructed wheel or an out-of-range supply voltage can cause it. But after 10 failed start attempts, a worn-out motor is a common outcome, so budget for possible replacement.
Could a power problem in my house cause Eb5?
Yes. Over- or under-voltage will trip the blower's protection. If your lights flicker or you have had utility power issues, mention that to the technician.
✓ Verified against manufacturer service manual — March 2026