Blue Star Error Codes
Every Blue Star error code we have catalogued, with what it means on site — 8 codes in total. In R-Pro, tap any code to get the meaning, likely causes and inspection steps, even with no signal in the plant room.
Common Blue Star codes
- LP — Low refrigerant pressure or blockage
- HP — High pressure (restricted airflow / overcharge)
- SP — Faulty or disconnected temperature sensor
- E1 — Indoor–outdoor communication failure
- E4 — Compressor overload
- F3 — Indoor or outdoor fan motor malfunction
- P6 — Inverter module problem
- dF — Defrost mode (normal)
| Code | What it means |
|---|---|
| LP | Low refrigerant pressure or blockage |
| HP | High pressure (restricted airflow / overcharge) |
| SP | Faulty or disconnected temperature sensor |
| E1 | Indoor–outdoor communication failure |
| E4 | Compressor overload |
| F3 | Indoor or outdoor fan motor malfunction |
| P6 | Inverter module problem |
| dF | Defrost mode (normal) |
Official Blue Star source / manual ↗
Frequently asked
What does Blue Star error code LP mean?
Blue Star error code LP means: Low refrigerant pressure or blockage. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Blue Star error code HP mean?
Blue Star error code HP means: High pressure (restricted airflow / overcharge). In R-Pro you also get the likely causes and the inspection steps — offline.
What does Blue Star error code SP mean?
Blue Star error code SP means: Faulty or disconnected temperature sensor. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Blue Star error code E1 mean?
Blue Star error code E1 means: Indoor–outdoor communication failure. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Blue Star error code E4 mean?
Blue Star error code E4 means: Compressor overload. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Blue Star error code F3 mean?
Blue Star error code F3 means: Indoor or outdoor fan motor malfunction. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Blue Star error code P6 mean?
Blue Star error code P6 means: Inverter module problem. In R-Pro you also get the likely causes and the inspection steps — offline.
What does Blue Star error code dF mean?
Blue Star error code dF means: Defrost mode (normal). In R-Pro you also get the likely causes and the inspection steps — offline.
Look up any error code — offline — in R-Pro.
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