Error code
Sensor error TE8 and/or TE9 Configured zone or mixing-valve sensor missing
Applies to 3 models
RXC35, RXC50, RXC65
What this means
TE8 and/or TE9 is configured but not connected, often because Dual Heating Curves or External Mixing Valve is enabled without the required sensor.
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.