Espresso Machine Troubleshooting Guide

Common Problems & Solutions

Even the best commercial espresso machines run into issues. Before calling a technician, many common espresso machine problems can be identified and sometimes fixed with a little know-how. At Passport Coffee, our factory-trained service team has diagnosed thousands of machines over 40 years. Here's what to check first.

Problem 1: Espresso is Extracting Too Fast (Under 20 Seconds)

What it means: Under-extraction — water is rushing through the puck too quickly.

What to check:

• Grind is too coarse - adjust your grinder finer, one step at a time
• Dose is too low - add 1 or 2g more coffee to your basket
• Tamp pressure is too light - apply firmer, more even pressure
• Basket has holes blocked or worn - inspect and replace if needed
• Group head pressure is low - may need a technician to calibrate pump pressure

Problem 2: Espresso is Extracting Too Slow (Over 35 Seconds)

What it means: Over-extraction — water is struggling to push through the puck.

What to check:

• Grind is too fine - adjust coarser
• Dose is too high - reduce by 1 or 2g
• Tamp is too hard - ease up slightly
• Portafilter basket is clogged - soak and deep clean
• Scale buildup in group head - may require descaling by a technician

Problem 3: Espresso Tastes Bitter

What it means: Usually over-extraction or dirty equipment.

What to check:

• Extraction time too long - adjust grind coarser
• Machine needs backflushing - coffee oil buildup causes bitter flavors
• Beans are too dark a roast for your taste, or past their prime
• Water temperature too high - check your machine's temperature setting
• Portafilter or basket not fully clean - soak and scrub

Problem 4: Espresso Tastes Sour or Weak

What it means: Under-extraction - not enough flavor compounds are being pulled from the grounds.

What to check:

• Grind too coarse - adjust finer
• Extraction too fast - see Problem 1
• Beans are too fresh (less than 5 days off roast) or too old (over 6 weeks)
• Water temperature too low - verify machine is fully warmed up

Problem 5: No Crema, or Very Thin Crema

What it means: Usually a coffee freshness or extraction issue.

What to check:

• Beans are stale - use fresher coffee (5–21 days off roast)
• Grind is too coarse
• Dose is too low
• Machine not at full temperature - allow 30 minutes of warm-up time
• Portafilter gasket worn - replace if crema issues persist

Problem 6: Machine is Leaking

What it means: Worn seals, loose fittings, or internal damage.

What to check:

• Leaking around portafilter: Group head gasket is worn - needs replacement
• Leaking from steam wand: Steam wand O-ring or valve seal worn
• Water dripping under machine: Internal fitting loose or hose cracked - call a technician immediately
• Drip tray overflow: Normal condensation - check and empty tray more frequently

⚠️ If water is leaking from inside the machine housing, turn off the machine and call Passport Coffee immediately at (480) 948-1419.

Problem 7: Steam Wand Has No Pressure or Weak Steam

What it means: Blockage, scale, or boiler issue.

What to check:

• Steam wand tip is clogged - soak tip in hot water and use a pin to clear holes
• Scale buildup in steam boiler - may need professional descaling
• Steam boiler not reaching temperature - check machine settings and warm-up time
• Steam valve worn - may need replacement by a technician

Problem 8: Machine Won't Turn On

What to check:

• Power connection and outlet - try a different outlet
• Reset switch (many commercial machines have a reset button near the base)
• Water reservoir is empty - some machines won't operate without water
• Check for error codes on the display - refer to your machine's manual

If the machine shows an error code, call us with the code and we can often diagnose the issue over the phone.

Problem 9: Pump is Noisy or Vibrating Excessively

What to check:

• Low water level - refill reservoir or check water line connection
• Air in the water line - prime the machine by running hot water through the group head
• Scale or debris in pump - professional cleaning required
• Pump worn and needs replacement - call a technician

Problem 10: Inconsistent Shot Volume or Flow

What to check:

• Group head solenoid needs cleaning
• Flow meter calibration is off (on volumetric machines) - technician required
• Pressure fluctuations from water supply - check incoming water pressure

When to Call a Professional

If you've worked through these checks and the problem persists, it's time for a professional. Passport Coffee's in-house service department is factory-trained on La Marzocco, Victoria Arduino, and Nuova Simonelli machines - the same machines we sell. We service what we sell, and we carry parts on hand.

📞 Call our service team at (480) 948-1419 — we can often diagnose the problem over the phone and get you back up and running fast.

Passport Coffee | 43 Years of Espresso Equipment Expertise | passportcoffee.com