Amana AMVC960803BN Error Code EC2: E-Module Network Communication Alarm
What Does Code EC2 Mean?
Error code EC2 on the Amana AMVC960803BN indicates that the integrated control module has lost communication with an external E-Module — an equipment relay module that is part of the ComfortNet system architecture. The E-Module is a separate accessory that provides additional control relay outputs for connected HVAC equipment or accessories.
The communication loss may be caused by a disconnected or damaged wiring harness between the E-Module and the furnace control board, a failure of the E-Module itself, or power loss to the E-Module. Because the E-Module is an external accessory rather than a core component, the furnace's primary heating function may still operate, but the features or equipment controlled by the E-Module will be unavailable.
A technician will verify that the E-Module is receiving power, check all wiring connections between the E-Module and the furnace control board, and test the E-Module for proper function. If the module has failed, it must be replaced.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Lost communication with external E-Module | Most common | ✗ Call a pro → |
| E-Module wiring disconnected or faulty | Common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- EC2 is present — a technician must check the E-Module's power supply and wiring connections before determining whether the module has failed
- The E-Module has failed — replacement requires professional service to ensure proper configuration and wiring
Sources
✓ Verified against manufacturer service manual — March 2026