🏊Pool Heater

IGN FAIL

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

Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control IGN FAIL Error Fix: Ignition Failure / Lockout

The heater attempted to ignite 3 times and failed — the burner did not light or the flame was not detected by the flame sensor; common causes include no gas supply (check gas meter valve and gas supply valve to heater are open), a dirty or cracked igniter (hot surface igniter glows but is too weak to ignite gas), a fouled flame sensor rod (carbon buildup prevents flame detection — clean with fine emery cloth, never sandpaper), blocked burner orifices (spider webs and insect nests in burner tubes are extremely common after the off-season), a faulty gas valve solenoid, or incorrect gas pressure; reset by cycling power off for 30+ seconds; if IGN FAIL recurs after 3 resets, professional service is required

Medium severity2 fixes available

Quick Answer

Error IGN FAIL on the Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control means: Ignition Failure / Lockout. The top-ranked community fix is “Test and Replace the Igniter or Gas Valve Solenoid” (medium difficulty, ~60 min, DIY cost: $15-$50). 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: $150-$300.

Other Jandy Models with Error IGN FAIL

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

pool_heater · 2 fixes

Other Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control Error Codes

AFS

Air Flow Switch Fault

Air/Gas Switch Fault

Communication Error

Combustion Fan Fault

Flue Exhaust Fault

Flow Fault — Insufficient Water Flow

2 fixes

Flame Sense Fault

2 fixes

Gas Fault

2 fixes

People Also Ask About Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control Error IGN FAIL

What does error code IGN FAIL mean on a Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control?

Error code IGN FAIL on the Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control means: Ignition Failure / Lockout. The heater attempted to ignite 3 times and failed — the burner did not light or the flame was not detected by the flame sensor; common causes include no gas supply (check gas meter valve and gas supply valve to heater are open), a dirty or cracked igniter (hot surface igniter glows but is too weak to ignite gas), a fouled flame sensor rod (carbon buildup prevents flame detection — clean with fine emery cloth, never sandpaper), blocked burner orifices (spider webs and insect nests in burner tubes are extremely common after the off-season), a faulty gas valve solenoid, or incorrect gas pressure; reset by cycling power off for 30+ seconds; if IGN FAIL recurs after 3 resets, professional service is required

How do I fix error code IGN FAIL on my Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control?

The most successful fix is "Test and Replace the Igniter or Gas Valve Solenoid" (medium difficulty, ~60 minutes). Estimated DIY cost: $15-$50. HomeMD has 2 community-ranked fixes for this error.

Is error code IGN FAIL on a Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control 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 JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control error IGN FAIL myself?

Yes — the top-ranked community fix ("Test and Replace the Igniter or Gas Valve Solenoid") is rated medium difficulty and takes about 60 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Adjustable wrench.

How much does it cost to repair Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control error IGN FAIL?

DIY cost: $15-$50. Professional repair typically costs $150-$300. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control have?

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), FE (Flue Exhaust Fault), and 3 more.

Which other Jandy models have the IGN FAIL error?

Error code IGN FAIL also appears on 1 other Jandy model: JXi 260 260,000 BTU Pool Heater with High Efficiency and 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 JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control have?

The Jandy JXi 400,000 BTU Pool and Spa Heater with Digital Temperature Control has 8 other known error codes:

AFS — Air Flow Switch Fault (2 fixes)
AGS — Air/Gas Switch Fault (2 fixes)
CE — Communication Error (2 fixes)
CF — Combustion Fan Fault (2 fixes)
FE — Flue Exhaust Fault (2 fixes)
FLO — Flow Fault — Insufficient Water Flow (2 fixes)
FS — Flame Sense Fault (2 fixes)
GF — Gas Fault (2 fixes)

Which other Jandy models have the IGN FAIL error?

Error code IGN FAIL also appears on 1 other Jandy model:

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

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