Jandy JXi 400K BTU (Natural Gas)
HeaterModel: JXI400NN
400,000 BTU natural gas pool heater. Polymer headers resist corrosion. Compact design.
Specifications
| btu | 400,000 |
| fuel | Natural Gas |
| heat exchanger | Polymer Header / Cupro-Nickel |
Common Replacement Parts
| Part Number | Name | Category | Notes | Shop |
|---|---|---|---|---|
| R0591400 | Igniter | igniter | Hot surface igniter. Test with multimeter before replacing. | Search in Shop |
| R0496503 | Blower Motor | motor | Replace if heater makes whining noise or won't draft. | Search in Shop |
| R0591200 | Flame Sensor | sensor | Clean with fine emery cloth first. Replace if heater fires then shuts off immediately. | Search in Shop |
Troubleshooting
Heater won't fire
Possible Causes
- Bad igniter
- Gas supply issue
- Control board fault
How to Fix
Check igniter with multimeter. Verify gas valve is open. NEVER work on gas connections without proper license — call us.
r13 error code
Possible Causes
- Stack flue sensor tripped (overheating)
How to Fix
Check for obstructed exhaust. Verify adequate clearance around heater. May need sensor replacement.
Schematic Coming Soon
We're working on adding an exploded parts diagram for this model.
Need this part?
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