Error code
live-filter-lamp-3-blinks Air filter cleaning reminder
How it shows on the unit Live filter indicator blinks 3 times, repeating every 21 seconds
Applies to 3 models
ASEH09KHCBN, ASEH12KHCBN, ASEH14KHCBN
What this means
The filter indicator requests cleaning of the air filter.
What you can check yourself
- Switch off the unit and clean the air filters.
- After cleaning, reset the filter indicator using the indoor-unit button for 2 seconds or less.
Still not resolved? Contact a qualified installer or servicer.
See the official Fujitsu manualA deep link to the manufacturer's own PDF for full technical detail. We link to manuals, we never host them.
Using Claude Code or Meta Muse? Connect HeatPump AI and ask it about live-filter-lamp-3-blinks.