You're in the middle of the morning rush. The queue is eight deep. And your espresso machine decides now is the perfect time to start pulling wonky shots.
We've all been there. And honestly? Most espresso problems have quick fixes that don't require calling a technician or cancelling service. The trick is knowing what to look for and having a mental checklist ready when things go sideways.
So let's walk through the most common espresso issues we see in cafés, and more importantly, how to fix them fast.
When Your Shots Are Running Too Slow
Slow extraction is probably the most common complaint we hear. Your shot takes 40+ seconds, tastes over-extracted and bitter, and your customers are tapping their feet.
First things first: check your grind. If you've recently adjusted your grinder or changed beans, you might have gone too fine. Make it slightly coarser and pull another shot. This should speed things up to that sweet spot of 25-30 seconds.
But if the grind isn't the issue, you're likely dealing with clumping or channeling. Ground coffee can stick together, creating dense pockets that water struggles to push through. The fix? Use a distribution tool or try the Weiss Distribution Technique (WDT) – basically just stirring the grounds with a thin needle or paperclip before tamping. Sounds simple because it is.

Also check your tamp. Are you applying pressure evenly, or are you tilting slightly? An uneven tamp creates channels where water finds the path of least resistance, leaving some coffee under-extracted and other parts drowning. Tamp straight down with consistent pressure – around 30 pounds of force works for most baskets.
And here's one that catches people out: when did you last clean your shower screen? Coffee oils build up quickly, especially during busy periods. A blocked screen restricts water flow before it even hits your puck. Give it a proper clean with a brush and some espresso machine cleaning solution.
When Shots Gush Through Too Fast
On the flip side, maybe your shots are racing through in 15 seconds and tasting sour and weak. This usually means you've gone too coarse on your grind, or you're not dosing enough coffee into the basket.
Adjust your grind finer. But also check your dose – are you actually filling the basket properly? Most double baskets need 18-20g depending on the basket size. Weigh it. Don't eyeball it, especially when you're troubleshooting.
Fast shots can also happen with old beans. Coffee starts to degas after roasting, and if your beans are more than a few weeks old (or, heaven forbid, months), they've lost their freshness. The CO2 that helps create resistance during extraction is gone. Fresh beans make a massive difference, which is why we're such sticklers about roast dates at Limini Coffee.
If you've checked all that and shots are still running fast, your machine's brew temperature might be too low. Some machines allow manual temperature adjustment – try raising it by a degree or two. Typically you want to be in the 90-96°C range for most coffees.
Clogging and Flow Issues
Water should flow through your machine consistently. If it's stuttering, barely trickling, or if you're getting odd pressure gauge readings, you're probably dealing with a blockage somewhere in the system.
Start with the obvious stuff. Is your water tank full and seated properly? Check your water supply hoses for kinks or disconnections. These simple things happen more often than you'd think, especially after moving machines or doing deep cleans.

Scale buildup is the silent killer of espresso machines. If you're in a hard water area, you're basically growing rock formations inside your machine. This blocks internal passages, clogs valves, and eventually kills your pump. The solution? Regular descaling. Use a proper commercial descaling product every few months, or more frequently if your water is particularly hard.
Your portafilter basket and shower screen need attention too. Remove the basket and hold it up to the light – can you see through all the holes clearly? If not, soak it in espresso machine cleaning solution overnight. Same goes for the shower screen and dispersion plate. These collect coffee oils and micro-particles that gradually restrict flow.
Don't forget your water filter. Replace it every 2-3 months minimum, or sooner if you're in a high-volume café. A clogged filter reduces water flow to the pump, which affects everything downstream.
Temperature Problems
Inconsistent temperature is trickier to diagnose but absolutely critical to fix. If your shots taste different from morning to evening, or you're getting sour shots followed by bitter ones with no changes to your process, temperature fluctuation is often the culprit.
First, are you warming up properly? Most commercial machines need at least 20-30 minutes to reach stable brewing temperature. The boiler might be hot, but the group head takes time to heat through. Pull and dump a few shots before you start serving to get everything up to temperature.
If you've got temperature stability issues beyond that, you might be looking at a failing thermostat, temperature probe, or heating element. These require professional attention. But before you call an engineer, check if your machine has PID temperature control that might need recalibrating – it's sometimes a simple menu adjustment rather than a hardware problem.

Grinder Troubles
Your grinder is just as important as your machine. Maybe more so, actually. An uneven grind means uneven extraction, which means inconsistent shots no matter how perfect your machine is running.
If you're getting both slow and fast shots seemingly at random, your grinder might be producing inconsistent particle sizes. This usually means your burrs are worn or misaligned. Burrs typically need replacing every 6-12 months in a busy café – it depends on your volume, but if you've never replaced them, that's probably your problem.
Keep your grinder clean. Old coffee oils go rancid and create a coating that affects grind consistency. Vacuum out the chamber regularly and use grinder cleaning tablets every month or so. We cover proper grinder maintenance in our barista training sessions because it's that important.
Check your grinder's retention too. If you're getting stale coffee from several shots ago mixed into your current dose, you'll get unpredictable results. Some grinders hold onto quite a bit of ground coffee. Purge a few grams between adjustments to clear out the old grounds.
Steam Wand Problems
Low steam pressure makes it impossible to texture milk properly, which is a disaster for any milk-based drinks. If your steam is weak or sputtering, start by purging the wand before and after every use. Milk gets sucked back into the wand and dries, creating blockages.
Clean the steam wand thoroughly at the end of every shift. Remove the tip if possible and soak it in water mixed with espresso machine cleaning solution. Use a pin or steam wand cleaning tool to clear the holes. Blocked holes reduce pressure and create uneven steam jets.
If the pressure has dropped suddenly, check whether you're trying to steam while pulling shots. On heat exchanger machines especially, you might not have enough boiler capacity to do both simultaneously. Let the boiler recover between tasks.
When to Call for Professional Help
Some problems are beyond quick fixes. If your pump sounds strained or unusually loud, if water is leaking from places it shouldn't (especially around seals and gaskets), or if you're getting very slow flow even with coarse grounds and fresh baskets, you need a technician.
Same goes if your steam pressure has dropped significantly despite cleaning, or if you're getting temperature swings that don't resolve with warm-up time. These typically indicate failing components – thermoblocks, heating elements, pumps, or seals – that need professional replacement.
Don't try to take apart your machine beyond basic cleaning unless you know what you're doing. Espresso machines operate under high pressure and temperature, and there are safety mechanisms in place that shouldn't be tampered with. Plus, you might void your warranty.
For more detailed guidance on maintaining your espresso equipment, we've got resources that go deeper into preventive care and long-term maintenance strategies.
Prevention Is Better Than Cure
Most espresso problems are avoidable with consistent maintenance routines. We recommend:
- Backflush with cleaning solution daily (if your machine supports it)
- Clean shower screens and portafilter baskets daily
- Purge and wipe steam wands after every use
- Replace water filters every 2-3 months
- Descale every 3-6 months depending on water hardness
- Replace grinder burrs every 6-12 months
- Service machines annually by a qualified technician
Keep a logbook of maintenance tasks. It sounds tedious, but it helps you spot patterns and prevents problems from sneaking up on you during busy periods.
The reality is that café equipment works hard. You're asking your machine to pull hundreds of shots per day, steam gallons of milk, and maintain precise temperatures throughout. A bit of preventive care goes a long way toward avoiding those mid-service meltdowns.
And if you're ever unsure about something, reach out. Whether it's to your equipment supplier, Limini Coffee, or a trusted technician, getting advice early prevents small issues from becoming expensive disasters. We'd much rather help you troubleshoot over the phone than have you limping through service with wonky espresso.
Keep those shots flowing. You've got this.




































