611
Takagi
Combustion Fan Motor Failure
Takagi water heater shows error 611; fan does not run or runs abnormally.
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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
Failed combustion fan motor, Obstruction in fan or flue, Loose or damaged fan wiring, Faulty fan driver circuit on PCB
How to Fix / Troubleshooting
Safety first: Turn OFF power and gas. Wait for the unit to cool. Do not insert fingers or tools into the fan while power is connected.
Steps:
- 1. Listen for fan operation: When the unit attempts to start, you should normally hear the fan. If it is silent or makes grinding noises, suspect a fan issue.
- 2. Inspect vent and intake: Check for obstructions that could prevent the fan from turning freely (debris, nests, ice). Clear any blockage at the terminations.
- 3. Visual fan check: With power OFF and cover removed, inspect the fan wheel for debris or damage. Gently spin it by hand; it should rotate smoothly.
- 4. Wiring: Ensure the fan motor connector is fully seated at the motor and PCB.
- 5. Replacement: If the fan is seized or error 611 persists, the combustion fan motor assembly likely needs replacement by a qualified technician, who should also verify proper venting and combustion.
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Repair Difficulty
Hard
4/5
Required Part
Combustion Fan Motor
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