Error code
H3 H3 fault
How it shows on the unit Indoor-unit temperature display shows H3; blink count is not specified
Applies to 2 models
GWH12QC-K6DNB8D/I, GWH12QC-K6DNA1D/O
What this means
The unit reports H3. The fault may clear after a restart; if it remains, service is required.
What you can check yourself
- Turn the unit off, disconnect power, wait about 3 minutes, and restart it; contact service if H3 returns.
Still not resolved? Contact a qualified installer or servicer.
See the Gree manual (hosted by an authorized distributor)Hosted by an authorized distributor rather than by the manufacturer. We link to manuals, we never host them.
Using Claude Code or Meta Muse? Connect HeatPump AI and ask it about H3.