Haier F4 fault code

What it means

Discharge temperature overheat protection (outdoor LED1 × 8)

Discharge temperature too high — shortage of refrigerant, restriction, or a discharge-sensor fault.

Safety: Discharge pipework runs very hot — allow to cool.

How to read it — indoor display + outdoor led1: Faults show as E/F codes on the indoor display; the outdoor PCB reports the same faults as LED1 flash counts — either surface lands you on the same code. (Haier service manual AS25PBAHRA (Pearl), §10 Service Diagnosis)

UK models this code applies to

From the Haier service literature we hold (Haier service manual AS25PBAHRA (Pearl) §10.3) — 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.