Gree F4 fault code

What it means

Outdoor condenser coil sensor open/short

The outdoor condenser tube sensor reads open or short circuit.

Safety: Safe isolation before disconnecting sensors or working on the PCB.

UK models this code applies to

From the Gree service literature we hold (Gree (Zhuhai) Service Manual, Bora Inverter R32 §9.1 Error Code List) — not a scraped list.

Now the harder half: proving what caused it

F4 names a symptom, not a root cause. In the app, the same code opens a guided investigation: what to measure first, the expected values for your exact model, and an honest verdict — including “nothing in this machine is broken” when that's what the readings say.