Hi all, had trouble in the last few days with shots running really fast and thin.
Started troubleshooting today, seems the coffee puck is being blasted with water as soon as I activate the brew lever, disrupting the bed and leading to the bad coffee.
The OPV is set to 8.5/9 Bar and it seems to reach this at the peak. The issue seems to be the pressure ramps up really fast, then some pressure is retained (according to the gauge) even after the lever is switched off and excess water is dumped to the tray.
The lever is also no longer resting at the mid-point allowing flow with no pressure, as soon as it reaches the mid-point the pressure shoots up.
At this point my assumption is there's a problem with the OPV, the lever mechanism or the pump microswitch but I'm unsure how to troubleshoot further. I've already run a backflush** (not descale as originally written) cycle in case there was some kind of build up of oils causing the issue but nothing has changed.
The uploader won't let me attach the video, here's an imgur link: https://imgur.com/a/fqRSEME. The video shows the unusual behaviour of the brew lever and the corresponding pressure readings.
Thanks all.
Started troubleshooting today, seems the coffee puck is being blasted with water as soon as I activate the brew lever, disrupting the bed and leading to the bad coffee.
The OPV is set to 8.5/9 Bar and it seems to reach this at the peak. The issue seems to be the pressure ramps up really fast, then some pressure is retained (according to the gauge) even after the lever is switched off and excess water is dumped to the tray.
The lever is also no longer resting at the mid-point allowing flow with no pressure, as soon as it reaches the mid-point the pressure shoots up.
At this point my assumption is there's a problem with the OPV, the lever mechanism or the pump microswitch but I'm unsure how to troubleshoot further. I've already run a backflush** (not descale as originally written) cycle in case there was some kind of build up of oils causing the issue but nothing has changed.
The uploader won't let me attach the video, here's an imgur link: https://imgur.com/a/fqRSEME. The video shows the unusual behaviour of the brew lever and the corresponding pressure readings.
Thanks all.

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