511
Takagi
Gas Solenoid Valve Circuit Error
Error 511 displayed; unit does not ignite.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Open or shorted gas solenoid coil, Damaged wiring harness to gas valve, Faulty main PCB driver circuit
How to Fix / Troubleshooting
Safety first: Turn OFF gas and power. Gas valve electrical testing should be done by a qualified technician.
Steps:
- 1. Visual inspection: Check the gas valve and its wiring harness for visible damage, burn marks, or loose connectors.
- 2. Reseat connectors: Firmly reconnect the gas valve plug at the valve and PCB.
- 3. Professional testing: If the error remains, a technician should measure coil resistance and verify PCB output. Replacement of the gas valve assembly or PCB may be required.
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Repair Difficulty
Professional Required
5/5
Required Part
Gas Valve Assembly
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