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Goodman · Furnace

Eb4 Blower motor current trip or lost rotor control

High severity Goodman/Amana *MVC96 (34.5 in. chassis)

What the control is telling you

The motor lost rotor control or drew high current, so the furnace stopped.

Applies to: GMVC96, GCVC96, AMVC96, ACVC96 (*BA, ComfortBridge)

Likely causes

  • Sudden change in motor load, speed or torque
  • Sudden blockage at the furnace air inlet or outlet

Test and repair steps

  1. Turn off power before touching wiring or the board.
  2. Check the filter, grilles, registers, ducts and the furnace air inlet and outlet for blockage.

Settings for these units

Models that show this code

16 models in Goodman/Amana *MVC96 (34.5 in. chassis)

*CVC960403BNB**CVC960603BNB**CVC960804CNB**CVC961005CNB**CVC961205DNB**MVC960403BNB**MVC960603BNB**MVC960803BNB**MVC960804CNB**MVC961005CNB**MVC961005DNB**MVC961205DNB*ACVC96AMVC96GCVC96GMVC96

Other codes on the same units

  • Eb0 Blower motor not running
  • Eb1 Lost communication with blower motor
  • Eb2 Blower motor hp does not match model data
  • Eb3 Blower motor running in power, temperature or speed limit
  • Eb5 Blower motor locked rotor
  • Eb6 Blower motor over/under voltage or over temperature
  • Eb7 Blower motor missing parameters
  • Eb9 Inadequate airflow

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Source: Goodman Service and Troubleshooting ACVC96*BA/AMVC96*BA/GCVC96*BA/GMVC96*BA , Alarm Code Table p.56 / Troubleshooting Chart p.63. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.