Gree Error Codes & Diagnostics
Complete diagnostic directory for official Gree fault codes. Verify root causes, safe troubleshooting steps, and replacement part numbers before calling a technician.
Gree E5 error code: overcurrent and supply voltage protection
Gree assigns E5 to an overcurrent protection trip. The control has seen the compressor circuit draw more current than its limit, and Gree links this to a supply voltage that is too high or that sags and swings under load. It points at the electrical supply, the connections, or the compressor and its drive rather than one named part. Applies to: Gree residential mini-splits that publish E5 in the protection code family This reading follows the Gree code overview and service literature for the residential mini-split families that publish E5 as a protection code. Other Gree ranges and other brands can map these characters differently, so match the indoor and outdoor model plates first. Owner-safe checks: Note whether E5 trips coincide with other large appliances running and whether the lights dim when the outdoor unit starts. | Check that the isolator switch by the outdoor unit is fully on and shows no scorching or a burnt smell, without opening it. Qualified technician: Measuring supply voltage under load, checking the feed size, inspecting energised connections, and testing the capacitor, contactor, and compressor current require a qualified technician or electrician.
Gree E6 error code: indoor-outdoor communication fault
On the documented Gree systems, E6 means the indoor and outdoor equipment are not communicating normally; it identifies a communication path fault, not a single failed part. Applies to: Multi21+ and documented residential mini-splits This meaning follows Gree literature for the Multi21+ capacities and the residential systems named in the manufacturer support article. Other Gree ranges, and the same characters on another brand, can be assigned to a different fault, so match the model plate before you use this page. Owner-safe checks: Record the complete indoor and outdoor model numbers and photograph the E6 display. | With the system off, confirm no recent breaker trip, outage, or visible cable damage occurred. Qualified technician: A technician should isolate power before inspecting terminals, wiring continuity, accessories, or control boards. | Do not perform the manual's powered voltage tests unless you are qualified for live electrical diagnostics.
Gree E7 error code: two indoor units asking for different modes
Gree assigns E7 to a mode conflict: two or more indoor units on the same outdoor unit have been set to modes the system cannot run at once. Nothing has failed, and setting the heads to one agreed mode clears it. Applies to: Multi21+ and the residential ranges in the Gree code overview This meaning follows the Gree manufacturer code overview and the Multi21+ 30K, 36K, and 42K service manual. A single-zone Gree system has no second head to disagree with, and other manufacturers assign E7 to unrelated faults, so read the plate before applying anything here. Owner-safe checks: Read the mode symbol on every indoor unit in the property, including heads in rooms nobody is using. | Stop every head from its own handset, then start only the room you want, and note whether E7 returns. | Photograph both rating plates and the E7 display before contacting service, in case the code survives the checks above. Qualified technician: A conflict code that remains after every head has been set to one mode needs a technician with the wiring diagram for your capacity. | Do not remove indoor or outdoor electrical covers to look for a stuck mode signal; that work belongs behind an isolated supply.
Gree F1: the indoor ambient sensing bulb is open or shorted
Gree assigns F1 to the indoor ambient temperature sensing bulb being open or short circuited. That bulb reads the air entering the indoor unit, which the system treats as the room temperature, so once the reading leaves its acceptable range the control has no reference against which to compare the set point. Applies to: Gree residential mini-split indoor units using the F-series sensing bulb codes described in Gree North America support Gree publishes the F-series sensing entries for its residential mini-split range. Gree also manufactures under other brand names, and a unit sold under a partner brand may present a different code set even where the hardware is related. Check the code against the manual supplied with your own indoor unit. Owner-safe checks: Read the two characters carefully and confirm it is F1 rather than F2 or another F-series entry, since the digit selects the sensor. | Compare the temperature the indoor unit reports with a thermometer placed near the intake, and record both. | Make sure nothing was left half-fitted after the last clean, particularly the front panel latch and the filter frames. Qualified technician: Gree places sensing bulb faults among the categories requiring a licensed technician, and the components sit inside the indoor casing. | Do not open the indoor unit to inspect or reseat a sensor connector. The same enclosure carries the supply to the board and the fan motor.
Gree F2: losing the coil sensor removes the freeze protection
Gree assigns F2 to the indoor evaporator sensing bulb being open or short circuited. That bulb sits on the indoor coil rather than in the air stream, and its reading is what freeze protection and cold-draught prevention are built on, so the unit stops rather than run those functions without a value it can trust. Applies to: Gree residential mini-split indoor units using the F-series sensing bulb codes described in Gree North America support The F-series entries described here belong to Gree residential mini-split equipment. Equipment manufactured by Gree and sold under a partner brand can present its own code set and its own sensor arrangement, so match the code to the manual issued with your indoor unit rather than to the manufacturer behind it. Owner-safe checks: Select fan-only operation if ice is present and let the coil thaw without applying heat, water, or any tool to it. | Photograph any frost or ice before it melts, since the pattern of where it formed is useful to service. | Note whether heating had been slow to blow warm air in the weeks before the code appeared. Qualified technician: A bulb clamped to refrigerant tubing behind the front panel is not owner-accessible, and Gree assigns this class of fault to a licensed technician. | Repeated indoor coil icing needs airflow and refrigerant assessment, which is certified work rather than something to diagnose from the room.
Gree H5 error code: intelligent power module protection
Gree identifies H5 as intelligent power module protection caused by an IPM synchronization or overcurrent condition; the protection can have airflow, refrigerant, wiring, board, or compressor causes. Applies to: Gree residential inverter systems covered by the OEM guide H5 as described here follows the Gree technical guide for residential inverter systems. Protection codes are tied to a specific drive design, so confirm the service manual for your model before treating this as the definition, and never assume a Gree code carries across to another manufacturer. Owner-safe checks: Turn the system off and look for a blocked return filter or obvious debris restricting the outdoor coil. | Record whether H5 appears immediately or only after the compressor begins operating. Qualified technician: Refrigerant pressure, compressor winding, DC bus, and live-voltage tests are technician work. | Do not replace a board or compressor until the root operating condition is confirmed.