Goodman GMVM970803BN Error Code EC: Inducer Motor Overcurrent Fault
What Does Code EC Mean?
An EC code on the Goodman GMVM970803BN indicates that the inducer motor is drawing more electrical current than is safe. This furnace uses a three-phase inducer motor controlled by a variable frequency drive (VFD) integrated into the control module, which modulates inducer speed to regulate combustion. The control module monitors motor current and shuts down the furnace when overcurrent is detected, because excessive current draw can indicate a mechanical problem that could damage the motor or the VFD circuitry.
When the motor encounters excessive resistance — such as from a blocked heat exchanger, misaligned burners creating backpressure, a displaced orifice plate, or a defective heat exchanger — it draws more current to try to maintain its commanded speed. If the current exceeds the safe threshold, the EC fault is triggered. A failing inducer motor with worn bearings can also draw excessive current as internal resistance increases. The furnace will not operate while this fault is active.
A qualified HVAC technician should begin by resetting system power to see if the condition clears. If it recurs, the technician needs to inspect the heat exchanger for blockages, verify the orifice plate is properly positioned, check burner alignment, and test the inducer motor. Given the complexity of the VFD-controlled inducer system and the need to work near gas components, this is not a DIY repair.
Common Causes
When to Call a Professional
Contact a licensed HVAC technician if:
- Call a technician to inspect the orifice plate position, heat exchanger for blockages, and burner alignment — these mechanical causes of inducer overcurrent must be corrected before the furnace is returned to service
- If mechanical causes are ruled out, the technician should test the inducer motor and may need to replace the motor assembly or the integrated control module containing the VFD
✓ Verified against manufacturer service manual — March 2026