Gree aircon 43 / 44 / 45 / 46 error code
Use this Gree 43 / 44 / 45 / 46 error code guide to decide when to stop resetting, what to capture, and what to check before parts are quoted. Match the model first; same-looking codes can point to different rows.
What does Gree 43 / 44 / 45 / 46 mean?
Gree 43 / 44 / 45 / 46 is listed as communication failure with Unit A, communication failure with Unit B, and communication failure with Unit C in Multi-Split, Wall-Mounted Split, Ceiling Cassette rows such as Multi GEN2 wall mount, Multi GEN2 cassette. The loaded row is source-backed by official diagnostic material. Do not collapse this code across model families; use the model, series, or system type to choose the right row. Confirm the exact model, series, or signal row before accepting a parts quote.
Loose, corroded, crossed, or damaged indoor-outdoor signal wiring.
Terminal block, connector, or junction fault on the indoor or outdoor side.
Indoor or outdoor PCB communication circuit fault after wiring is proven sound.
What to do now
Use these steps before another reset, signal-wire check, or PCB quote.
Stop using the unit if 43 / 44 / 45 / 46 returns
If 43 / 44 / 45 / 46 returns after one reset, stop repeated restarts and get the matching source row diagnosed.
Reset 43 / 44 / 45 / 46 once
Capture the 43 / 44 / 45 / 46 display first, then power-cycle once only and note whether the same fault returns.
Send these to us
43 / 44 / 45 / 46 error code, a clear display photo, Gree model stickers, affected rooms, reset result, and whether one room or every room failed
What to check before repair
Use this split to separate safe evidence capture from the tests a technician should prove before quoting parts.
| You can check | Technician should confirm |
|---|---|
| Before resetting 43 / 44 / 45 / 46, take a clear display photo. | Match 43 / 44 / 45 / 46 against the exact model-family source row before quoting parts. |
| Capture the Gree indoor and outdoor model stickers so the correct family row is used. | Test communication terminals, cable continuity, polarity, and outdoor power. |
| Note whether one room, several rooms, or the whole system is affected, plus whether it returns after one reset. | Read indoor and outdoor PCB indicators only after the signal path is proven sound. |
What changes the next step
These clues decide whether the first check is room-side, shared outdoor-side, refrigerant-side, source-table, or model-family confirmation.
| What you see | What it points to |
|---|---|
| Only one indoor unit shows 43 / 44 / 45 / 46. | The affected room, indoor board path, wiring route, or local component should be checked first. |
| Several rooms or the outdoor unit show the same 43 / 44 / 45 / 46 fault. | The shared outdoor side, power path, communication trunk, or refrigerant circuit needs priority checking. |
| The fault returns immediately after one reset. | Start with the source-row diagnostic branch before approving parts. |
| The same code appears with different meanings in the source rows. | Model family, source table, and system type decide which meaning applies before parts are quoted. |
| The model belongs to Multi-Split, Wall-Mounted Split, Ceiling Cassette rows such as Multi GEN2 wall mount, Multi GEN2 cassette. | The loaded row is source-backed by official diagnostic material. Use the matching source row before quoting parts. |
Wiring or PCB decision
Gree 43 / 44 / 45 / 46 should start with terminal, signal-cable, and power checks. PCB replacement only makes sense after the communication path is proven sound.
A loose terminal or bad junction is a targeted repair once the path is confirmed.
Signal-wire replacement depends mostly on access through trunking, ceiling, or concealed routes.
PCB cost should be weighed against age only after wiring and power checks pass.
Read next
Use these if the quote mentions the parts, checks, or repair path this code points to.
Other Gree error codes
If the code you're seeing isn't 43 / 44 / 45 / 46, jump to one of these or browse the full Gree list.
Ready to get started?
Tell us what’s going on. Symptoms, setup, photos, anything we should know. We’ll assess and come back with the right next step.