Rocket Espresso Air / Steam Entrained in Hot Water Circuit

Hot water tap sputters with steam and water, or delivers mostly steam instead of hot water.

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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

Low boiler water level, Faulty boiler level probe, Scale affecting level detection, Improper boiler fill after service

How to Fix / Troubleshooting

Safety first: Use caution when opening the hot water tap; hot water and steam can cause burns.

  • Bleed air: With the machine fully heated, open the hot water tap and run water until the flow becomes steady and free of steam bursts.
  • Check water level control: If sputtering returns quickly, the boiler may be running at too low a water level. Inspect and clean the level probe.
  • Descale level probe: Remove and descale the probe tip to ensure accurate level sensing.
  • Service if persistent: If the boiler does not maintain a stable water level, the level control circuit or Gicar box may need professional attention.
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Repair Difficulty

Medium 3/5

Required Part

Boiler Level Probe
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