Goodman Furnace: Check ECM control/end bell
Check ECM control/end bell on a Goodman furnace: Checks the thermistor, capacitors and connector resistance in the control/end bell.
Applies to: ECM blower motors on ACVC96/AMVC96/GCVC96/GMVC96
Common causes of check ecm control/end bell
- Cracked thermistor, bulging capacitors or low resistance in the connector.
How to fix check ecm control/end bell: step by step
- Disconnect power and wait 5 minutes for capacitors to discharge.
- Disconnect the motor control and motor power harnesses, then remove the blower assembly.
- Remove the 3 screws and separate the control/end bell from the motor. Disconnect the 3-circuit harness.
- Inspect the NTC thermistor. Replace the control/end bell if it is cracked or broken.
- Inspect the large capacitors. Replace the control/end bell if any are bulging or swollen.
- Measure resistance between each terminal in the 3-circuit connector. 100 kΩ or greater is good. Replace if lower.
- Reassemble in reverse and reinstall the blower assembly.
Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.
If the unit shows an error code, look it up: Goodman Furnace codes
Source: Goodman GMVC96 service and troubleshooting manual, p. 46. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.