MECH-FILTER-BAG
Polaris · Polaris 380 Pressure-Side Pool Cleaner
The filter bag (or zipper bag) has problems: (1) Bag is torn or has holes — inspect the mesh for rips, especially along seams and the zipper. UV exposure and chemicals degrade the mesh over time. Replace the bag. (2) Bag falls off the cleaner — the throat (opening) of the bag clips onto the feed pipe. If the bag collar is stretched or the snap ring is broken, the bag will detach. Replace the bag or the snap ring. (3) Bag fills up too quickly — if there is heavy debris in the pool (leaves, sand after a storm), the bag fills fast and the cleaner stops cleaning effectively. Empty the bag more frequently. Consider upgrading to a larger-capacity bag if your model supports it. (4) Double-zipper bags — make sure both zippers are fully closed or debris spills out.
Error MECH-FILTER-BAG on the Polaris Polaris 380 Pressure-Side Pool Cleaner means: Filter Bag Issues — Torn, Falls Off, or Fills Quickly. The top-ranked community fix is “Replace Torn Filter Bag or Snap Ring” (medium difficulty, ~30 min, DIY cost: $15-$30). 2 community-ranked fixes available below.
Published February 2026 · 2 fixes · pool cleaner
Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.
While many pool cleaner repairs can be done safely at home, consider hiring a qualified technician if:
Average professional repair cost for this issue: $110-$160.
Backup Valve Not Cycling
Drive Belt Broken or Worn
Cleaner Climbs Wall and Flips Over
Hose Float Issues — Sinking or Wrong Position
Hose Tangling or Coiling
Loss of Water Pressure / Reduced Cleaning Power
Quick Disconnect Screen Clogged
Cleaner Moves Slowly or Sluggishly
The Polaris Polaris 380 Pressure-Side Pool Cleaner has 8 other known error codes:
Error code MECH-FILTER-BAG also appears on 3 other Polaris models:
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