Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater AFC Error Fix: Airflow Current Fault

The combustion blower motor current is abnormal — drawing too much current (motor bearing failure, debris in blower wheel) or too little current (wiring issue, failing motor); the LXi monitors blower current to verify proper operation; check blower motor operation and wiring; may indicate failing blower motor that needs replacement

Medium severity2 fixes available

Quick Answer

Error AFC on the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater means: Airflow Current Fault. The top-ranked community fix is “Test and Replace the Combustion Blower Motor if Faulty” (hard difficulty, ~60 min, DIY cost: $0-$20). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · pool heater

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 heater 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: $250-$400.

Other Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater Error Codes

Air/Gas Switch Fault

Communication Error

Flue Exhaust Fault

Flow Fault — Insufficient Water Flow

2 fixes

Gas Valve Fault

2 fixes

HLS

High Limit Switch Tripped

Ignition Failure

Polymer Header Crack (LXi-Specific)

2 fixes

People Also Ask About Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater Error AFC

What does error code AFC mean on a Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater?

Error code AFC on the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater means: Airflow Current Fault. The combustion blower motor current is abnormal — drawing too much current (motor bearing failure, debris in blower wheel) or too little current (wiring issue, failing motor); the LXi monitors blower current to verify proper operation; check blower motor operation and wiring; may indicate failing blower motor that needs replacement

How do I fix error code AFC on my Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater?

The most successful fix is "Test and Replace the Combustion Blower Motor if Faulty" (hard difficulty, ~60 minutes). Estimated DIY cost: $0-$20. HomeMD has 2 community-ranked fixes for this error.

Is error code AFC on a Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater error AFC myself?

Yes — the top-ranked community fix ("Test and Replace the Combustion Blower Motor if Faulty") is rated hard difficulty and takes about 60 minutes. Tools needed: T20 Torx screwdriver, Clamp ammeter, Multimeter.

How much does it cost to repair Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater error AFC?

DIY cost: $0-$20. Professional repair typically costs $250-$400. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater have?

The Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater has 8 other known error codes, including: AGS (Air/Gas Switch Fault), CE (Communication Error), FE (Flue Exhaust Fault), FLO (Flow Fault — Insufficient Water Flow), GV (Gas Valve Fault), and 3 more.

What other error codes does the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater have?

The Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater has 8 other known error codes:

AGS — Air/Gas Switch Fault (2 fixes)
CE — Communication Error (2 fixes)
FE — Flue Exhaust Fault (2 fixes)
FLO — Flow Fault — Insufficient Water Flow (2 fixes)
GV — Gas Valve Fault (2 fixes)
HLS — High Limit Switch Tripped (2 fixes)
IGN — Ignition Failure (2 fixes)
MECH-01 — Polymer Header Crack (LXi-Specific) (2 fixes)

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