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Gree Mini-Split Error Codes: Full Reference in 2026

by Dua Jones April 28, 2026

Gree mini-splits display fault codes as alphanumeric codes on the indoor unit's LED display, or as blink patterns on indicator-only models. Gree is one of the world's largest HVAC manufacturers and supplies components to many other brands — their error code system is consistent across the Gree lineup and familiar to most HVAC technicians. This guide covers the most common Gree mini-split error codes and recommended first responses.

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Common Gree Mini-Split Error Codes

Error Code	Meaning	DIY Fix?	First Step
E1	High pressure protection	Partially	Clear outdoor unit airflow; reset at breaker
E2	Low pressure protection / refrigerant issue	No	Call EPA-certified technician — refrigerant leak check
E3	Outdoor fan motor fault	Partially	Check outdoor unit for debris; call technician
E4	Compressor discharge temperature too high	Partially	Clear outdoor unit airflow; reset; call tech if recurring
E5	Overcurrent protection	No	Reset breaker; verify electrical supply; call tech
E6	Communication error (indoor to outdoor)	Partially	Reset breaker; check and reseat signal wire at both ends
F1	Indoor intake temperature sensor fault	No	Reset; call tech if recurring — thermistor replacement
F2	Indoor coil temperature sensor fault	No	Call technician — thermistor replacement
F3	Outdoor temperature sensor fault	No	Reset; call tech if recurring
H3	Compressor overload protection	No	Reset; call tech if recurring — compressor or capacitor
H6	Indoor fan motor fault / no feedback	No	Check for obstructions; call technician
P1	Freeze protection — coil temperature too low	Yes	Clean filter; thaw coil 2–3 hrs; restart
C5	Outdoor discharge pipe temperature sensor fault	No	Call technician — thermistor replacement

How to Read Gree Error Codes

On Gree units with an LED display panel, the error code appears directly as an alphanumeric designation. On indicator-only models, the OPERATION light blinks in a repeating sequence — count the flashes before each pause to identify the error number. Some Gree models use a combination of OPERATION and TIMER light patterns — count each independently and reference the combination in your model's service manual.

Always write down the exact code before performing a breaker reset, as the reset clears the code from memory.

Frequently Asked Questions

My Gree mini-split shows E6 — what does it mean?

E6 is a communication error between the indoor and outdoor unit. Try a full breaker reset first — off 30 seconds, on, wait 3 minutes before operating. If E6 returns immediately or consistently, the signal wire between the units has a loose connection or break. Inspect the 3- or 4-conductor communication wire at the terminal blocks of both the indoor and outdoor units and reseat any loose connections.

Can I clear a Gree error code without a technician?

A breaker reset clears the code from memory. If the underlying fault condition is resolved (e.g., you cleaned the filter causing P1), the code will not return. If the same code reappears within minutes, the system has a persistent fault that requires technician diagnosis and repair.