Pentair Pentair Clean & Clear Plus Cartridge Pool Filter AIR IN SYSTEM Error Fix: Air in Filter System

Air bubbles are visible in the pump basket or air is being blown from the pool return jets. Air is entering the plumbing system. Check the air relief valve on top of the filter — it should be opened after any service that involves opening the plumbing (let air bleed until water sprays out, then close). Also check the pump lid O-ring, all suction-side pipe joints, and the pump drain plug for air leaks. A consistent stream of air bubbles usually indicates a suction-side leak between the pool and the pump.

warning2 fixes available✨ Free fix available

Quick Answer

Error AIR IN SYSTEM on the Pentair Pentair Clean & Clear Plus Cartridge Pool Filter means: Air in Filter System. The top-ranked community fix is “Replace Pump Lid O-ring and Inspect Suction-Side Plumbing for Leaks” (medium difficulty, ~45 min, DIY cost: $10-$20). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · pool filter

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.

When to Call a Professional

While many pool filter repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $120-$180.

Other Pentair Pentair Clean & Clear Plus Cartridge Pool Filter Error Codes

AIR VALVE FAIL

Air Relief Valve Failure

2 fixes

BAND CLAMP FAIL

Belly Band Clamp Failure

2 fixes

DAMAGED CARTRIDGE

Damaged Filter Cartridge

Drain Plug Leak

Pressure Gauge Failure

High Filter Pressure

Lid O-Ring Leak

Low Filter Pressure

People Also Ask About Pentair Pentair Clean & Clear Plus Cartridge Pool Filter Error AIR IN SYSTEM

What does error code AIR IN SYSTEM mean on a Pentair Pentair Clean & Clear Plus Cartridge Pool Filter?

Error code AIR IN SYSTEM on the Pentair Pentair Clean & Clear Plus Cartridge Pool Filter means: Air in Filter System. Air bubbles are visible in the pump basket or air is being blown from the pool return jets. Air is entering the plumbing system. Check the air relief valve on top of the filter — it should be opened after any service that involves opening the plumbing (let air bleed until water sprays out, then close). Also check the pump lid O-ring, all suction-side pipe joints, and the pump drain plug for air leaks. A consistent stream of air bubbles usually indicates a suction-side leak between the pool and the pump.

How do I fix error code AIR IN SYSTEM on my Pentair Pentair Clean & Clear Plus Cartridge Pool Filter?

The most successful fix is "Replace Pump Lid O-ring and Inspect Suction-Side Plumbing for Leaks" (medium difficulty, ~45 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

Is error code AIR IN SYSTEM on a Pentair Pentair Clean & Clear Plus Cartridge Pool Filter serious?

This error is rated warning severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Can I fix Pentair Pentair Clean & Clear Plus Cartridge Pool Filter error AIR IN SYSTEM myself?

Yes — the top-ranked community fix ("Replace Pump Lid O-ring and Inspect Suction-Side Plumbing for Leaks") is rated medium difficulty and takes about 45 minutes. Tools needed: Strap wrench, Flathead screwdriver, Silicone grease.

How much does it cost to repair Pentair Pentair Clean & Clear Plus Cartridge Pool Filter error AIR IN SYSTEM?

DIY cost: $10-$20. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Pentair Pentair Clean & Clear Plus Cartridge Pool Filter have?

The Pentair Pentair Clean & Clear Plus Cartridge Pool Filter has 8 other known error codes, including: AIR VALVE FAIL (Air Relief Valve Failure), BAND CLAMP FAIL (Belly Band Clamp Failure), DAMAGED CARTRIDGE (Damaged Filter Cartridge), DRAIN PLUG LEAK (Drain Plug Leak), GAUGE FAILURE (Pressure Gauge Failure), and 3 more.

What other error codes does the Pentair Pentair Clean & Clear Plus Cartridge Pool Filter have?

The Pentair Pentair Clean & Clear Plus Cartridge Pool Filter has 8 other known error codes:

AIR VALVE FAIL — Air Relief Valve Failure (2 fixes)
BAND CLAMP FAIL — Belly Band Clamp Failure (2 fixes)
DAMAGED CARTRIDGE — Damaged Filter Cartridge (2 fixes)
DRAIN PLUG LEAK — Drain Plug Leak (2 fixes)
GAUGE FAILURE — Pressure Gauge Failure (2 fixes)
HIGH PRESSURE — High Filter Pressure (2 fixes)
LID ORING LEAK — Lid O-Ring Leak (2 fixes)
LOW PRESSURE — Low Filter Pressure (2 fixes)

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