What It Means
High-pressure switch opened due to elevated system discharge pressure.
Bryant Heat Pump
Bryant Heat Pump Error Code 31
Troubleshooting guide for the Bryant Heat Pump system fault 31.
Possible Causes
- Refrigerant overcharge.
- Dirty outdoor coil or failed outdoor fan motor in cooling mode.
- Restricted indoor airflow or dirty filter in heating mode.
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.
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Full Diagnosis
High Pressure Switch Open. High-pressure switch is open; board indicates the event and retries after 15 minutes.
All Recorded Causes
Check refrigerant charge level. Inspect outdoor fan operation and coil for airflow restrictions or debris. In heating mode, check indoor coil for airflow restrictions. Verify refrigerant charge is within specification.
Verify Before Replacing Parts
- Confirm the exact Bryant model family and heat pumps context before acting on a generic code description.
- Verify airflow first, then confirm operating pressures and temperature relationship before adjusting charge, since check refrigerant charge level.
- Look for restrictions, iced coils, or dirty heat-transfer surfaces that can mimic a charge problem, and separately confirm inspect outdoor fan operation and coil for airflow restrictions or debris.
- 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.
