🏊Pool Heater

Jandy · LXi 400,000 BTU Low NOx Pool and Spa Heater

Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater FE Error Fix: Flue Exhaust Fault

Flue/exhaust system problem detected — blocked or partially blocked vent pipe, condensation in vent, rain water entry, or improper vent installation; inspect full vent run from heater to termination; clear obstructions; verify vent specifications

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error FE on the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater means: Flue Exhaust Fault. The top-ranked community fix is “Evaluate and Correct Exhaust Vent Installation Issues” (medium difficulty, ~90 min, DIY cost: $10-$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 Models with Error FE

JXi 260 260,000 BTU Pool Heater with High Efficiency and Digital Temperature Control

pool_heater · 2 fixes

JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control

pool_heater · 2 fixes

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

AFC

Airflow Current Fault

Air/Gas Switch Fault

Communication Error

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 FE

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

Error code FE on the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater means: Flue Exhaust Fault. Flue/exhaust system problem detected — blocked or partially blocked vent pipe, condensation in vent, rain water entry, or improper vent installation; inspect full vent run from heater to termination; clear obstructions; verify vent specifications

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

The most successful fix is "Evaluate and Correct Exhaust Vent Installation Issues" (medium difficulty, ~90 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

Is error code FE 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 FE myself?

Yes — the top-ranked community fix ("Evaluate and Correct Exhaust Vent Installation Issues") is rated medium difficulty and takes about 90 minutes. Tools needed: Tape measure, T20 Torx screwdriver, PVC pipe cutter, Caulking gun with high-temp silicone sealant.

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

DIY cost: $10-$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: AFC (Airflow Current Fault), AGS (Air/Gas Switch Fault), CE (Communication Error), FLO (Flow Fault — Insufficient Water Flow), GV (Gas Valve Fault), and 3 more.

Which other Jandy models have the FE error?

Error code FE also appears on 2 other Jandy models: JXi 260 260,000 BTU Pool Heater with High Efficiency and Digital Temperature Control, JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control. The fix may vary by model, so check each model's specific page for tailored repair steps.

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:

AFC — Airflow Current Fault (2 fixes)
AGS — Air/Gas Switch Fault (2 fixes)
CE — Communication Error (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)

Which other Jandy models have the FE error?

Error code FE also appears on 2 other Jandy models:

JXi 260 260,000 BTU Pool Heater with High Efficiency and Digital Temperature Control (pool heater) · 2 fixes
JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control (pool heater) · 2 fixes

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