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Jura Error 5

Thermoblock Failed to Properly Heat

This error message indicates the Thermoblock failed to heat. For Jura coffee machines without a LED screen, the following will occur:

  • A-Line: The cleaning symbol will light up for a few seconds and then the machine will shut off.
  • C5: All symbols will be flashing, which may also indicate the Brew Group failed to initialize. Refer to Error 8.
  • ENA-Micro: The cleaning symbol will light up for a few seconds and then the machine will shut off.

The following parts may be the cause of the problem:

Possible Faulty Parts: Fix:
The Thermoblock is severely corroded or clogged with scale, preventing it from reaching the required temperature to brew coffee. Replace Thermoblock.
The Over-Temperature Protection is defective or blown. This fuse is a shut off mechanism when the Thermoblock exceeds the max temperature, or there is a power surge during the brew process. If this fuse is blown, it may indicate there is an underlying problem in the circuit. Visually check the fuse and contact pins for corrosion. Also, check the OHMs reading to ensure there is a connection. It is recommended to replace the temperature sensor and fuse.
The Power Board is defective. The board is failing to receive the necessary signal that the coffee thermoblock has reached the required temperature to initiate the brew process. Replace the PCB; however, it is more economical to buy a new or refurbished machine.

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