Hayward H400FDN Universal H Series Troubleshooting Guide - Page 29
Open FC3 &/or F1 Fuse
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3. Open FC3 &/or F1 Fuse Open FC3 &/or F1 Fuse Check the remote connection/high limits Test gas valve wires for continuity against ground Replace gas valve: (pg. 20) Replace wiring harness: FDXLWHA1930 YES Are any wires showing continuity? NO YES Inspect ICB wiring, any wires compromised? NO Replace ICB: FDXLICB1930 29 Is low voltage wiring damaged, pinched, or worn? NO Is water pressure switch wiring damaged, pinched, or worn? NO Is blower vacuum switch wiring damaged, pinched, or worn? NO Is gas valve wiring damaged, pinched, or worn? NO YES YES YES YES Replace wire harness: FDXLWHA1930 OR high limit if damaged: FDXLHLI1930 Replace wire harness: FDXLWHA1930 OR pressure switch if damaged: FDXLWPS1930 Replace wire harness: FDXLWHA1930 OR vacuum switch if damaged: FDXLBVS1930 Replace wire harness: FDXLWHA1930 OR Replace gas valve: Please refer to (pg. 20)
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