H1
Fagor
Overheating / Temperature Too High
Dishwasher shows H1; water overheats and there may be excessive steam when opening the door.
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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
Stuck heater relay on PCB, Faulty NTC sensor reading too low, Limescale on heater causing localized overheating, Control board logic fault
How to Fix / Troubleshooting
Safety first: Allow the dishwasher to cool completely and disconnect power before inspection.
- Check NTC sensor: Test the Fagor NTC as described in F7. A sensor reading too low can cause overheating.
- Inspect heater: Check for heavy limescale buildup on the heater. Descale the machine using a dishwasher descaler if necessary.
- Control board: If the heater continues to run when it should be off, the PCB heater relay may be stuck closed and the board must be replaced.
- Do not use: Avoid using the dishwasher until the overheating issue is resolved to prevent damage or safety hazards.
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Repair Difficulty
Professional Required
5/5
Required Part
Fagor main control board (heater relay) or NTC sensor
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