Safe visible checks
- Thermostat display and settings
- Filter condition and return-air path
- Visible outdoor-unit obstruction
- Photos of the code, unit, and nameplate
Product troubleshooting
Use this table to identify what the visible code may mean and what information to share when scheduling service. Keep checks simple and visible; do not open electrical, refrigerant, gas, or sealed equipment compartments.
Error-code table
| Code | Meaning | System area | Safe first step | Action |
|---|---|---|---|---|
| High pressure switch open | High pressure switch open | High pressure safety | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
| Low pressure switch open | Low pressure switch open | Low pressure safety | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
| High head pressure | High head pressure | Refrigeration pressure | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
| Low suction pressure | Low suction pressure | Refrigeration pressure | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
| Condensate overflow | Condensate overflow input active | Condensate safety | Document the flash pattern, check thermostat, filter, and visible outdoor-unit obstruction status, and schedule service if the condition remains. | View details |
| Filter change required | Filter change required diagnostic | Airflow and maintenance | Document the flash pattern, check thermostat, filter, and visible outdoor-unit obstruction status, and schedule service if the condition remains. | View details |
| Compressor drive diagnostic | Variable-speed compressor drive diagnostic | Compressor drive | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
No matching error codes found.
Safety note
These pages are meant to help document the issue, not replace diagnosis. GreenFlow should handle pressure-switch, electrical, refrigerant, lockout, recurring, and warranty-related conditions.
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Try another nearby city or contact GreenFlow to confirm service availability.