Amana AMVC960803BN Error Code EC3: Bluetooth Module Network Communication Alarm
What Does Code EC3 Mean?
Error code EC3 on the Amana AMVC960803BN indicates that the integrated control module has lost communication with the Bluetooth communication module. The Bluetooth module is an accessory that enables wireless communication between the furnace and a compatible mobile app or Bluetooth-enabled thermostat.
Because Bluetooth connectivity is not a core function of the heating system, the furnace should continue to operate normally for heating purposes. The loss of Bluetooth communication affects only app-based monitoring, remote control through the Bluetooth interface, or any other functions specifically routed through the Bluetooth module.
A technician will check the wiring connection between the control board and the Bluetooth module, verify the module is receiving power, and test the module's operation. A failed or disconnected module will need to be reconnected or replaced. If Bluetooth functionality is not important to the homeowner, the fault may be acknowledged without urgent repair.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Bluetooth module disconnected or failed | Most common | ✗ Call a pro → |
| Wiring issue between control and Bluetooth module | Common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- EC3 is present and the Bluetooth connection is needed — a technician must check the module wiring and replace the module if it has failed
- The Bluetooth module wiring is intact but the fault persists — the module itself requires professional replacement
Sources
✓ Verified against manufacturer service manual — March 2026