The milk sputters when dispensed, hissing noises are heard when milk is heated/frothed, or only hot milk comes out despite froth being selected.
| Possible Cause | How to Fix |
|---|---|
| Milk pipework was not fitted correctly (note the seam on the double hose; different diameters on double hose) | Take note of the seam on the double hose when fitting it to the central spout. If detached from the rinsing valve, pay attention to accurate assembly of different diameters. |
| Milk temperature is too high | Use cold milk below 10 deg C (50 deg F). |
| Central spout not fitted correctly / drawing in air / spouts are blocked | Check assembly of central spout. Ensure all parts are tightly connected. Clean the spout under running water. |
| Milk pipework, connection pieces, stainless steel tube, and milk siphon are blocked | Clean all parts thoroughly with the cleaning brush. |
| Steam jet on the central spout is blocked | Clean the steam jet with the cleaning brush. |
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