Error code
Filter replacement alarm Filter replacement or cleaning required
Applies to 3 models
RXC35, RXC50, RXC65
What this means
The air filter needs cleaning or replacement.
What you can check yourself
- Turn off the heat pump at its main switch.
- Vacuum-clean the filter at least every three months or replace it annually.
- Reset the alarm on the display and restart the heat pump.
Still not resolved? Contact a qualified installer or servicer.
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.