Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control FE Error Fix: Flue Exhaust Fault

Error code FE on the Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control means: Flue Exhaust Fault. A problem was detected with the flue/exhaust system — may indicate a blocked or partially blocked exhaust vent pipe, condensation buildup inside the vent pipe, rain water entering the vent, or incorrect vent installation (too long, too many elbows, improper termination height or location); inspect the full vent run from the heater exhaust outlet to the termination point outside; clear any obstructions; verify the vent meets the installation manual specifications for length, rise, and number of elbows

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.

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

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.

DIY cost: $10-$20. Professional repair typically costs $250-$400. Many homeowners save money by trying the top-ranked community fix first.

The Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control has 8 other known error codes, including: AFS (Air Flow Switch Fault), AGS (Air/Gas Switch Fault), CE (Communication Error), CF (Combustion Fan Fault), FLO (Flow Fault — Insufficient Water Flow), and 3 more.

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