Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater PS Error Fix: Pressure Switch Fault

Error code PS on the Jandy LXi 400,000 BTU Low NOx Pool and Spa Heater means: Pressure Switch Fault. The combustion air pressure switch did not close — verifies that the combustion blower is creating proper airflow before gas release; causes include failed blower, blocked exhaust vent, water in vent pipe, disconnected or cracked pressure switch tubing, or defective switch; check vent termination for blockages; inspect rubber tubing from blower housing to pressure switch

The most successful fix is "Replace Pressure Switch and Inspect Combustion Blower" (medium difficulty, ~45 minutes). Estimated DIY cost: $15-$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 ("Replace Pressure Switch and Inspect Combustion Blower") is rated medium difficulty and takes about 45 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Needle-nose pliers.

DIY cost: $15-$25. Professional repair typically costs $180-$250. 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.

Error code PS also appears on 2 other Jandy models: JXi 260 260,000 BTU Pool Heater with High Efficiency and Digital Temperature Control, 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.