Hey everyone, I've had a Vibiemme super HX for about a year now and I'm having problems with it today. When I tried to flush it this morning it acted like I had a blind filter in it. It ramped up to brewing pressure and no water came out. When I turned the brew button off no water came out of the valve into the drip tray. There is water coming out of the backflow line that returns to the water reservoir.
Yesterday I removed the mushroom to check scale build-up. There is some scale build-up, but I don't think it's bad enough to cause problems. I removed the mushroom and de-scaled it today to see if that would help (I had planned on doing a full de-scale today as well). That didn't help. I added de-scale solution into the reservoir and started to de-scale, but without water going through the grouphead, etc. I'm not so sure that will help.
I referred to a few threads and the maintenance guide from 1st-line and decided to remove the OPV spring and check everything there. The OPV is very difficult (almost impossible) to turn counter-clockwise and it will not turn anymore at this point (it moved about a quarter-turn overall). So, I was unable to check the spring, etc.
Any ideas? Help is greatly appreciated.