JURA IMPRESSA J5 ERROR 5
If you have a Jura Impressa J5 with an “Error 5” on the display, spending 5 minutes of your time reading the following will be a good investment.

The symptoms are machine says heating and then times out to the error 5. Google will tell you Error 5 is a thermoblock issue. There is only one in this model so lets find it and start there.
- Meter the element. I got 37.5 Ohms, so I was happy with that.
- Meter the thermal fuses, I got an open circuit on BOTH thermal fuses. This tells me they have been doing their job and have been taken out by a thermal event. As Ive said so many times in blogs, it’s the triac.
- Remove the power board and replace the heating triac, this is the one on the large heatsink. You can not miss it. I replaced the BTB08-800W triac with a BTB16800W. Both have the same switching voltages and tolerances. I sell them under components.

That’s it. Replacing the triac require some specialist tools and skills, but can be done. Anyway, you wont find a replacement board so its time to learn how to do it and the tools are not expensive.
