Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater IGN Error Fix: Ignition Failure

Error code IGN on the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater means: Ignition Failure. The LXi heater failed to ignite after the retry sequence — the burner did not light or flame was not detected; check gas supply (ensure gas meter valve and supply valve to heater are open), clean the hot surface igniter with fine emery cloth, clean the flame sensor rod, inspect burner tubes for spider webs and insect debris (extremely common after off-season storage), check gas valve operation, verify correct gas pressure; reset by cycling power off for 30 seconds; if ignition failure recurs after multiple resets, professional service is required

The most successful fix is "Inspect Burner Tubes and Verify Gas Pressure" (hard difficulty, ~90 minutes). Estimated DIY cost: $20-$40. 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 ("Inspect Burner Tubes and Verify Gas Pressure") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Manometer, Compressed air canister, Flashlight, Multimeter.

DIY cost: $20-$40. Professional repair typically costs $250-$400. Many homeowners save money by trying the top-ranked community fix first.

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), FE (Flue Exhaust Fault), FLO (Flow Fault — Insufficient Water Flow), and 3 more.