Short answer: Filter Not Present is a filter-status warning, not the same thing as a simple dirty-filter reminder. Start by checking the physical filter/skimmer setup, seating, water level, and whether the warning appears with any flow code.
Contents
What to check first
- Turn the spa off before handling filter/skimmer parts.
- Confirm the filter or adapter/filter assembly is seated correctly.
- Check for debris, blocked openings, or a loose/collapsed cartridge.
- Confirm water level is high enough for the skimmer path.
- Restore power and see whether the warning clears.
- If the warning returns with FLO/FLC or ER flow codes, troubleshoot flow next.
Filter Not Present vs filter purge vs CLE
Message |
Likely category |
Meaning for owner |
|---|---|---|
Filter Not Present |
Filter status/detection |
Check physical filter setup and seating. |
Filter purge |
Filtration cycle/status wording |
Usually related to filtration programming or purge cycle behavior. |
CLE |
Cleaning reminder |
Treat as a maintenance reminder, not a hard failure. |
FLO/FLC |
Flow/flow switch |
Use flow-code troubleshooting. |
If you use Spa Filter Adapter Kit v3
After installing any adapter or replacement filter setup, seating matters. The adapter should not be loose, tilted, blocked, or forcing the cartridge into an awkward position. If a warning appears right after installation, check the physical installation before chasing sensors.
When to move to flow-code troubleshooting
If Filter Not Present appears with weak water movement, heater shutoff, FLO, FLC, ER 00, or ER 01, switch to the Arctic Spa FLO/FLC code guide. At that point the question is no longer just filter status; it is whether the spa is moving enough water safely.
Related guides
Next step: If your tub is a 2020+ Arctic Spas Custom Series spa with the matching Pro Filter setup, see Spa Filter Adapter Kit v3 to switch to compatible generic replacement filters.
FAQs
What does Filter Not Present mean on an Arctic Spa?
It usually means the system/app/controller does not recognize the expected filter state or filter-related setup. Exact behavior can vary by model and software.
Is Filter Not Present the same as FLO?
No. FLO is a flow warning. Filter Not Present is more directly about filter detection or filter status, though a bad filter setup can still create flow problems.
Can I ignore Filter Not Present?
Do not ignore it if water clarity, filtration, or flow warnings are also present. If it is only a reminder/status issue, confirm the filter is seated and follow the manual/app prompts.
Can the adapter cause Filter Not Present?
The adapter changes the filter path on compatible tubs, so the filter area should be installed and seated correctly. If a warning appears after any filter change, inspect the physical setup first.
What should I check first?
Check that the filter/skimmer parts are seated, the filter is not collapsed or loose, the water level is correct, and no debris is blocking flow.
References
This guide is an independent aftermarket support resource. Spa Filter Adapter is not affiliated with or endorsed by Arctic Spas. Official Arctic Spas support/manual pages were used as references and linked nofollow below.