Jandy JXi 260 260,000 BTU Pool Heater with High Efficiency and Digital Temperature Control HL Error Fix: High Limit Tripped

Error code HL on the Jandy JXi 260 260,000 BTU Pool Heater with High Efficiency and Digital Temperature Control means: High Limit Tripped. The high limit thermostat detected water temperature exceeding the safe maximum (typically 135°F) — the heater shuts down to prevent scalding and heat exchanger damage; almost always caused by inadequate water flow through the heater — dirty filter, low pump speed, closed valves, or a scaled heat exchanger; the high limit is a resettable thermal switch; let the heater cool, restore adequate flow, and restart; if it trips repeatedly, investigate the root cause — do NOT bypass or jumper the high limit switch as this creates a scalding and equipment damage hazard

The most successful fix is "Inspect and Descale Heat Exchanger" (hard 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 ("Inspect and Descale Heat Exchanger") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Bucket, Protective gloves, Eye protection.

DIY cost: $10-$20. Professional repair typically costs $200-$350. 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), AGS (Air/Gas Switch Fault), CE (Communication Error), CF (Combustion Fan Fault), FE (Flue Exhaust Fault), and 3 more.

Error code HL also appears on 1 other Jandy model: 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.