E14
Attack Gas Valve Control / Modulation Fault

Boiler displays E14; ignition may not start or may be erratic.

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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

Defective gas valve coil on Attack gas valve, Loose gas valve electrical connector, Incorrect gas valve adjustment, Faulty PCB gas valve driver circuit

How to Fix / Troubleshooting

Safety: Work on gas components must comply with local regulations. If you are not licensed, do not attempt gas valve repairs.

Steps:

  • Visual inspection: With power off, inspect the gas valve body and connector for damage or signs of overheating.
  • Check connector: Ensure the multi‑pin plug is fully seated and the cable is not strained.
  • Reset and observe: Restore power, reset the boiler, and observe ignition. If E14 reappears, do not continue to reset.

Professional repair: Gas valve testing, replacement, and adjustment must be performed by an authorized Attack technician using proper combustion analysis equipment.

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Repair Difficulty

Professional Required 5/5

Required Part

Gas Valve Assembly
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