Hayward Universal H-Series 250K BTU (Natural Gas)
HeaterModel: W3H250FDN
250,000 BTU natural gas pool heater. Low NOx emissions. Cupro-Nickel heat exchanger for salt pools.
Specifications
| btu | 250,000 |
| fuel | Natural Gas |
| heat exchanger | Cupro-Nickel |
Common Replacement Parts
| Part Number | Name | Category | Notes | Shop |
|---|---|---|---|---|
| FDXLGSV0001 | Gas Valve | valve | LICENSED GAS TECH ONLY. Replace if heater won't ignite after verifying igniter. | Search in Shop |
| FDXLICB1930 | Integrated Control Board | board | Main control board. Replace if heater shows erratic behavior or error codes. | Search in Shop |
| FDXLHLI1930 | H-Series Igniter | igniter | Hot surface igniter. Common failure — check with multimeter (should read 40-90 ohms). | Search in Shop |
Troubleshooting
Heater won't ignite
Possible Causes
- Bad igniter
- Gas valve failure
- No gas supply
How to Fix
Check igniter ohms (FDXLHLI1930). Verify gas is on. NEVER attempt gas valve work without license — call us.
Heater fires then shuts off
Possible Causes
- Pressure switch issue
- Low flow
- Dirty filter
How to Fix
Clean filter first. Check pressure switch. Verify pump is running at adequate speed.
Schematic Coming Soon
We're working on adding an exploded parts diagram for this model.
Need this part?
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