Junkers Gas leak at boiler connections

Boiler emits smell of gas near the casing

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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

Loose gas union, Damaged gas valve, Cracked burner seal, Faulty gas pipe joint

How to Fix / Troubleshooting

Critical safety warning: If you smell gas, do not operate electrical switches, do not use open flames, and do not attempt repairs yourself.

  • Shut off gas: Close the main gas valve to the property if safely accessible.
  • Ventilate: Open windows and doors to disperse gas.
  • Evacuate: Leave the building and contact your gas emergency service and a certified Junkers technician.
  • Professional repair only: A gas-safe engineer must locate the leak using approved leak detection methods and repair or replace the leaking component.
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Repair Difficulty

Professional Required 5/5

Required Part

Gas Valve Assembly
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