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Coffee Machine Troubleshooting Guide

← Resources & Downloads Support & Maintenance Coffee Machine Troubleshooting Guide Before calling an engineer, work through this guide. Most common coffee machine problems have simple fixes you can do yourself in minutes. Safety...

Coffee Machine Troubleshooting Guide

← Resources & Downloads

Support & Maintenance

Coffee Machine Troubleshooting Guide

Before calling an engineer, work through this guide. Most common coffee machine problems have simple fixes you can do yourself in minutes.

Safety first: Never open the machine casing or attempt internal repairs yourself. If in doubt, switch off and contact us.

Problem: Coffee Tastes Weak or Watery

  • Grind is too coarse — adjust to a finer setting
  • Not enough coffee being dosed — increase the dose in machine settings
  • Beans are stale — check roast date, replace if over 4 weeks old
  • Water temperature too low — run a cleaning cycle and check settings
  • Machine needs descaling — limescale reduces water temperature and pressure

Problem: Coffee Tastes Bitter or Harsh

  • Grind is too fine — adjust to a coarser setting
  • Machine is dirty — run a full cleaning cycle immediately
  • Over-extraction — reduce brew time or dose
  • Water temperature too high — check machine settings
  • Dark roast beans — try a medium roast for a smoother result

Problem: No Coffee Coming Out

  • Water tank is empty — refill and restart
  • Grind is too fine — the puck is blocking water flow; adjust coarser
  • Brew group is blocked — remove and rinse under warm water
  • Machine needs descaling — severe limescale can block internal pipes
  • Pump failure — if none of the above, contact us for an engineer visit

Problem: Machine Is Leaking

  • Drip tray is full — empty and refit correctly
  • Water tank not seated properly — remove, check seal, and refit
  • Group head seal is worn — this is a service part; contact us to replace
  • Internal pipe connection loose — switch off and contact us immediately

Problem: Machine Won't Turn On

  • Check the power cable is fully plugged in at both ends
  • Check the socket is working (test with another device)
  • Check the machine's power switch — some have a rear switch as well as a front button
  • Allow the machine to cool if it has overheated — some machines have a thermal cutout
  • If still no power, contact us — do not attempt to open the machine

Problem: Error Code on Display

Error codes vary by manufacturer and model. Common ones include:

  • "Fill Water" / water icon — Refill the water tank
  • "Empty Grounds" / grounds icon — Empty the grounds container
  • "Descale" / descale icon — Run a descale cycle immediately
  • "Clean" / brush icon — Run a cleaning cycle
  • "Service" / spanner icon — Professional service required; contact us

For model-specific error codes, refer to your machine manual or contact our support team.

Problem: Milk Not Frothing Properly

  • Steam wand is blocked — soak tip in hot water and clean with a pin
  • Milk is too warm — always start with cold milk straight from the fridge
  • Wrong milk type — full-fat milk froths best; some plant milks don't froth well
  • Milk circuit needs cleaning — run a milk cleaning cycle
  • Steam pressure low — machine may need descaling or a service

Still having problems?

Our engineers are available across the UK for same-day or next-day callouts. Get in touch and we'll get your machine back up and running fast.

Request an Engineer →

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Café Perfection workplace planning resources

Make the page useful

Use the right source for the right job.

General guidance helps explain the task. The exact product/manual, current manufacturer information and site procedure should remain the source of truth where a model-specific instruction is needed.

01

Match the model

Use model-specific documents where the exact method or specification matters.

02

Check the version

Old PDFs and generic guides can be useful background but should not quietly replace current instructions.

03

Know the boundary

Separate normal user care from work that needs a trained engineer or site dutyholder decision.

04

Keep a record

Where a task matters operationally, record the date, equipment and action so the information is useful later.

Before you commit

Turn the page into a decision you can defend.

The useful next step is not more product copy. It is confirming the few facts that can change the recommendation, the installation or the day-to-day workload.

1

Use the right version

Model-specific manufacturer information should win when an exact method, limit, compatibility or specification matters.

2

Apply it to the actual site

A generic guide can explain the principle, but utilities, local procedures, risk assessments and competent-person work remain site-specific.

3

Keep evidence usable

Record the asset, date, action and responsible person so a cleaning or service sheet tells you what actually happened.

Coffee. Water. Done Right.

Make the next step simple.

Use the guided tools or talk to Café Perfection and we’ll help narrow the right route for your site.