Pull the Perfect Espresso.
Barista Chat.
Expert help dialling in your Breville or DeLonghi espresso machine — grind size, dose, extraction, milk texturing & machine faults.
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Common Espresso Issues & Troubleshooting
Espresso Shots Running Too Fast
Usually the grind is too coarse — we'll help you find the sweet spot for your beans and machine.
Shots Too Slow or Choking the Machine
Grind too fine, too much dose, or over-tamping. Common on Breville Barista Express — we'll walk you through adjustments.
Sour or Bitter Espresso
Sour = under-extracted, bitter = over-extracted. We'll help you adjust grind, dose, and yield for balanced espresso.
Inconsistent Shots Day to Day
Could be distribution, stale beans, grinder retention, or temperature. Small changes make a big difference.
Milk Not Texturing / No Microfoam
Steam wand technique, milk temperature, and jug position all matter — we'll help you get smooth microfoam.
Machine Not Working / Error Lights
No power, leaking, poor pressure, or error lights on your Breville or DeLonghi? We'll help troubleshoot.
Espresso Machine Care Tips
- Always let your machine warm up fully before pulling shots — at least 15-20 minutes
- Never run the steam wand dry — always purge before and after steaming milk
- Use filtered water to extend machine life and improve espresso taste
- Backflush your Breville regularly with cleaning tablets as per the manual
- Descale your espresso machine every 2-3 months depending on water hardness
Frequently Asked Questions
What grind size should I use on my Breville Barista Express?▾
Start around grind size 5 on the internal Breville grinder with the default 'razor' dose. Aim for 30ml of espresso in about 25-30 seconds. Adjust finer if shots run fast, coarser if they choke. Every bean is different so you'll need to re-dial when you change beans.
Why are my espresso shots sour on my DeLonghi?▾
Sour shots on a DeLonghi Dedica or La Specialista mean under-extraction — the water passed through the coffee too quickly. Try grinding finer, increasing your dose slightly, or tamping more evenly. Also check your beans aren't too fresh (2-7 days off roast is the sweet spot).
How do I know when my espresso is dialled in properly?▾
A well-dialled shot should pour like warm honey, starting with a few drips then a steady stream. Aim for a 1:2 ratio (e.g. 18g in, 36g out) in 25-30 seconds. It should taste balanced — not sour, not bitter, with some sweetness.
Why do I need to change grind size when I change coffee beans?▾
Different beans have different densities, roast levels, and ages, which all affect how water flows through them. A grind setting that works for one bean will likely be wrong for another. Always re-dial when switching beans.
How do I texture milk properly on my Breville or DeLonghi?▾
Purge the steam wand first, position the tip just below the milk surface at a slight angle, and introduce air for 2-3 seconds. Then submerge the tip to create a whirlpool. Stop when the jug is too hot to hold (~65°C). Tap and swirl to remove bubbles.
What's the best coffee-to-water ratio for espresso?▾
The standard starting point is a 1:2 ratio — for example, 18g of ground coffee yielding 36g of liquid espresso. Ristretto is around 1:1.5, lungo around 1:3. Adjust to taste, but 1:2 in 25-30 seconds is the universal starting point.
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Important Disclaimer
The information provided on this website is for general guidance and educational purposes only. It does not constitute professional advice. All espresso machine repairs involving internal components, wiring, or plumbing should be carried out by qualified technicians. Barista Chat accepts no liability for any injury, damage, or loss arising from the use of information provided on this site. Always prioritise safety and follow your machine manufacturer's guidelines.