Jandy JXi 260 260,000 BTU Pool Heater with High Efficiency and Digital Temperature Control AGS Error Fix: Air/Gas Switch Fault

Error code AGS on the Jandy JXi 260 260,000 BTU Pool Heater with High Efficiency and Digital Temperature Control means: Air/Gas Switch Fault. The combined air/gas pressure switch detected an abnormal condition — this switch monitors both combustion air pressure and gas manifold pressure; check gas pressure at the heater (natural gas should be approximately 3.5 inches WC supply pressure; LP/propane should be approximately 11 inches WC); check combustion blower operation; check vent system for blockages; gas pressure adjustment requires a licensed technician with a manometer

The most successful fix is "Test and Adjust Gas Pressure and Replace Air/Gas Pressure Switch" (hard difficulty, ~90 minutes). Estimated DIY cost: $10-$25. 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 ("Test and Adjust Gas Pressure and Replace Air/Gas Pressure Switch") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Manometer, Multimeter.

DIY cost: $10-$25. Professional repair typically costs $220-$400. Many homeowners save money by trying the top-ranked community fix first.

The Jandy JXi 260 260,000 BTU Pool Heater with High Efficiency and Digital Temperature Control has 8 other known error codes, including: AFS (Air Flow Switch Fault), CE (Communication Error), CF (Combustion Fan Fault), FE (Flue Exhaust Fault), FLO (Flow Fault — Insufficient Water Flow), and 3 more.

Error code AGS also appears on 2 other Jandy models: JXi 400,000 BTU Pool and Spa Heater with 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.