Error code
C5 C5 fault
How it shows on the unit Indoor-unit temperature display shows C5; blink count is not specified
Applies to 2 models
GWH12QC-K6DNB8D/I, GWH12QC-K6DNA1D/O
What this means
The unit reports C5 and the manual directs the owner to contact service.
When to call a technician
This fault involves refrigerant, pressure, or electrical work that must be handled by a certified technician under EU F-gas rules. Do not attempt to open the refrigerant circuit, access mains wiring, or adjust pressure components yourself. Contact a qualified installer or servicer for this one.
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 C5.