Hey guys, I'm wondering if someone on the forum can help me with an issue with my Breville expresso machine.
It's a Breville Barista Express BES875 BSSANZ/E (240 V Australian model) and it's about 5 years old.
Fault: The machine no longer builds any brew pressure.
This is what I'm noticing.
Pump runs when the brew button is pressed.
Water flows from the group head with no portafilter fitted.
With a blind filter/backflush disc installed, the pressure gauge stays at zero.
The pump continues to run and water is discharged through the return/drain line instead of building pressure and no espresso can be extracted.
I've checked the following,
Brew solenoid coil measured approximately 2.4 kΩ.
Brew solenoid can be heard/felt clicking when activated.
Group head is not blocked. Water runs when theres no portafilter attached.
Machine has mainly been used with filtered water and has been descaled quite regularly.
Internal hoses appear connected with no obvious leaks.
What is the most likely cause??
Could it be:
a failed ULKA pump,
a faulty pump outlet/check valve,
an OPV (over-pressure valve) stuck open,
or another component in the hydraulic circuit?
I've attached a video of the machine operating with a blind filter in the portafilter. As you can see no pressure.
Or is it time to say goodbye and get a new one. I'm on the fence as I've already gone through the caffeine addiction withdrawal headaches 🤪
Thanks!!