E6
Remeha Fan or air pressure fault

Boiler displays E6 and will not start

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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 flue fan, Blocked air intake or flue, Faulty air pressure switch, Damaged fan wiring or connector

How to Fix / Troubleshooting

Safety first: Do not run the boiler with suspected flue or fan issues. Isolate power and gas. Fan and flue work must be done by a qualified engineer.

  • Listen for fan operation: When there is a demand for heat, you should hear the fan start before ignition. If there is no sound, the fan may be faulty or not powered.
  • Check external flue terminal: Ensure the air intake and exhaust are not obstructed.
  • Engineer tasks: Test the fan for correct voltage and operation, check and replace the air pressure switch if necessary, inspect the silicone tubes to the pressure switch for splits or blockages, and verify flue integrity.
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Repair Difficulty

Professional Required 5/5

Required Part

Flue Fan Assembly
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