F6
Giant
Lower Heating Element Circuit Fault
F6 error and limited hot water on electric Giant water heater
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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 lower heating element, Burned wiring at lower element, Tripped lower thermostat, Excessive sediment covering lower element
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker and confirm with a meter. Hot water may still be present.
- Access lower element: Remove the lower access panel and insulation to expose the lower thermostat and element.
- Inspect wiring: Check for loose or burned wires at the lower element and thermostat. Repair or replace as needed.
- Test element: Disconnect wires from the lower element and measure resistance. Replace the Giant lower heating element if open or shorted to ground.
- Flush sediment: Drain and flush the tank to remove sediment that can bury the lower element and cause overheating or failure.
- Reassemble and test: Restore power and verify that the heater recovers fully. If F6 remains, the thermostat or control board may need replacement.
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Repair Difficulty
Medium
3/5
Required Part
Giant Lower Heating Element
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