What It Means
Communication between the heat pump control board and user interface is lost.
Bryant Heat Pump
Bryant Heat Pump Error Code 16
Troubleshooting guide for the Bryant Heat Pump system fault 16.
Possible Causes
- Loose or damaged communication wiring.
- Incorrect thermostat or UI wiring connections.
- Control board communication failure.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
New to this code? Click to see why this happens
Full Diagnosis
Communications Loss. Communication with the control/UI has been lost.
All Recorded Causes
Check wiring to the User Interface, indoor unit, and outdoor unit for loose connections or damage. Verify thermostat/UI wiring is correct. Power cycle the system and re-test communication.
Verify Before Replacing Parts
- Confirm the exact Bryant model family and heat pumps context before acting on a generic code description.
- Confirm board LEDs, wiring polarity, and model compatibility before replacing control boards — this Bryant fault points at check wiring to the User Interface, indoor unit, and outdoor unit for loose connections or….
- Check for intermittent communication faults caused by connectors, moisture, or damaged harnesses, and rule out verify thermostat/UI wiring is correct.
- After the correction, run the system long enough to confirm the heat pumps fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Bryant Heat Pump diagnostics step-by-step — so you confirm the cause before swapping parts.
