Jura coffee machine not turning on

Start with the simplest possibility.

• Confirm the wall socket is working by plugging in another appliance.
  
• Avoid extension leads or overloaded multi-way adapters.
  
• Ensure any removable Jura mains cable is fully pushed into the machine.
  
• Check that the plug fuse has not failed.
  
• Inspect the cable for cuts, crushing or overheating.
  

Jura specifies that the machine should be connected directly to a suitable domestic power outlet and that damaged mains cables should never be used due to the risk of electric shock.

Many Jura machines require a deliberate press of the power button rather than a quick tap.

When switched on correctly you should normally hear:

• the display illuminating
  
• internal system checks
  
• the brew unit initialise
  
• an automatic rinse cycle beginning
  

If absolutely nothing happens—no display, lights or sounds—the problem is usually electrical rather than software related. The manual confirms that pressing the On/Off button starts the machine, followed immediately by the automatic rinse sequence.

If your Jura has been stored in a garage, delivered during winter or left in a cold vehicle, the internal safety system may prevent start-up.

Several Jura models display Error 2 or Error 5 when the machine has been exposed to low temperatures. The recommended solution is simply to allow the machine to reach room temperature before switching it on again.

Leave the machine indoors for several hours before retrying.

Most Jura machines monitor the position of the drip tray and grounds container.

If either is not fully inserted:

• the machine may refuse to complete its start-up sequence
  
• the display may remain on a warning message
  
• brewing functions will be disabled
  

Remove both parts, empty them, wipe the sensors clean and slide them firmly back into position until fully seated. The manual specifically lists "Drip tray not fitted" as a condition that prevents operation until corrected.

A poorly seated water tank can prevent normal operation.

Remove the tank and:

• rinse it with fresh cold water
  
• refill using fresh, cold, still water only
  
• firmly reinstall it
  

Jura advises using only fresh cold water and recommends replacing the water daily to maintain reliable operation.

Sometimes the machine is actually powered on but waiting for user input.

Common Jura messages include:

• Fill water tank
  
• Empty drip tray
  
• Empty coffee grounds container
  
• Fill bean container
  
• Change filter
  
• Clean
  
• Descale
  
• Clean milk system
  

Resolving these maintenance requests often allows the machine to continue operating normally.

If the display has frozen:

1. Switch the machine off.
   
2. Unplug it from the mains.
   
3. Wait 5–10 minutes.
   
4. Reconnect power.
   
5. Switch it back on.
   

This allows the electronics to fully reset after a temporary software interruption.

If there is:

• no display
  
• no lights
  
• no clicking
  
• no motor movement
  
• no rinse cycle
  
• no response whatsoever
  

the fault may be internal.

• failed power supply board
  
• faulty power switch
  
• damaged mains input
  
• failed control PCB
  
• blown internal fuse
  
• wiring connection faults following transport
  

These faults normally require professional diagnosis.