Air purifier error codes and fault guides
Browse 41 published, evidence-gated Air purifier guides. Each page states the supported model and region, official source, safe checks, and the point to stop.
Air purifier fault guides
1–24 of 41
the manual fan reset has not completed
3-in-1 filter light after replacement is identified by Blueair support as the manual fan reset has not completed. Follow the official, model-scoped checks and service boundary below.
the 3-in-1 filter-replacement indicator remains active
3-in-1 red filter indicator is identified by Blueair support as the 3-in-1 filter-replacement indicator remains active. Follow the official, model-scoped checks and service boundary below.
the purifier needs a documented factory reset to clear a persistent control state
Blue Pure Max factory reset is identified by Blueair support as the purifier needs a documented factory reset to clear a persistent control state. Follow the official, model-scoped checks and service boundary below.
the purifier may have a power-cable, pre-filter, sensor, or filter-seating issue
Blue Pure Max will not turn on is identified by Blueair support as the purifier may have a power-cable, pre-filter, sensor, or filter-seating issue. Follow the official, model-scoped checks and service boundary below.
the Classic filter-replacement timer is still active
Classic red filter light is identified by Blueair support as the Classic filter-replacement timer is still active. Follow the official, model-scoped checks and service boundary below.
dust may have accumulated on the particle sensor and created a false indication
Constantly high particle reading is identified by Blueair support as dust may have accumulated on the particle sensor and created a false indication. Follow the official, model-scoped checks and service boundary below.
the Classic filter counter has not accepted the reset command
Filter timer light remains on is identified by Blueair support as the Classic filter counter has not accepted the reset command. Follow the official, model-scoped checks and service boundary below.
the filter timer remains active after the reset sequence
Red filter light after factory reset is identified by Blueair support as the filter timer remains active after the reset sequence. Follow the official, model-scoped checks and service boundary below.
the filter timer has not been reset after a new filter was installed
Red filter light after replacement is identified by Blueair support as the filter timer has not been reset after a new filter was installed. Follow the official, model-scoped checks and service boundary below.
airflow may be restricted by the filter or inlet openings
Airspeed not powerful is identified by Dyson support as airflow may be restricted by the filter or inlet openings. Follow the official, model-scoped checks and service boundary below.
the purifier is reporting a model-specific service or filter condition
Amber flashing light is identified by Dyson support as the purifier is reporting a model-specific service or filter condition. Follow the official, model-scoped checks and service boundary below.
the activated-carbon filter is due for replacement
Carbon filter alert is identified by Dyson support as the activated-carbon filter is due for replacement. Follow the official, model-scoped checks and service boundary below.
the purifier is responding to a sensor or airflow condition despite the displayed colour
Display reads green but fan runs high is identified by Dyson support as the purifier is responding to a sensor or airflow condition despite the displayed colour. Follow the official, model-scoped checks and service boundary below.
the purifier has reached its filter-service point
Filter needs replacing is identified by Dyson support as the purifier has reached its filter-service point. Follow the official, model-scoped checks and service boundary below.
the HEPA filter is due for replacement
HEPA filter alert is identified by Dyson support as the HEPA filter is due for replacement. Follow the official, model-scoped checks and service boundary below.
the purifier filter-life counter still needs resetting after replacement
HEPA filter life not reset is identified by Dyson support as the purifier filter-life counter still needs resetting after replacement. Follow the official, model-scoped checks and service boundary below.
the purifier remote or its control link is not responding
Remote control does not work is identified by Dyson support as the purifier remote or its control link is not responding. Follow the official, model-scoped checks and service boundary below.
the NanoProtect HEPA filter needs replacement
A0 / AO is identified by Philips support as the NanoProtect HEPA filter needs replacement. Follow the official, model-scoped checks and service boundary below.
the NanoProtect activated-carbon filter needs replacement
C0 / CO is identified by Philips support as the NanoProtect activated-carbon filter needs replacement. Follow the official, model-scoped checks and service boundary below.
the appliance has detected a malfunction
E1 is identified by Philips support as the appliance has detected a malfunction. Follow the official, model-scoped checks and service boundary below.
the appliance has detected a malfunction
E2 is identified by Philips support as the appliance has detected a malfunction. Follow the official, model-scoped checks and service boundary below.
the appliance has detected a malfunction
E3 is identified by Philips support as the appliance has detected a malfunction. Follow the official, model-scoped checks and service boundary below.
the appliance has detected a malfunction
E4 is identified by Philips support as the appliance has detected a malfunction. Follow the official, model-scoped checks and service boundary below.
overheat protection has been triggered on AMF870 and AMF872
E6 is identified by Philips support as overheat protection has been triggered on AMF870 and AMF872. Follow the official, model-scoped checks and service boundary below.