Error code
Heating cooling hazard alarm Heating-system cooling hazard
Applies to 3 models
RXC35, RXC50, RXC65
What this means
Return temperature TE2 falls below 1.5 °C for 30 seconds; the condition is also monitored during hot-water operation.
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 official ComfortZone manualA deep link to the manufacturer's own PDF for full technical detail. We link to manuals, we never host them.