OK for the following vids
- Your a bit of a scamp, because as @MediumRoastSteam said the pump started before you lifted the lever…what did you do? Did you switch it on and pump started?, or did it just start on it’s own. I wish you had not lifted the lever so fast and left it to see how high the pump pressure would actually go. That could have been a great diagnostic.
- The blind filter shot was interesting, as you say a small pressure rise at the end and might have gone a tad more had you waited longer. I noted this time machine was on and pump only started when you lifted the lever
- You got the camera back to the gauge eventually. I would have preferred it stayed at the level it was for the other 2 videos and you had shown us at the end how much water came out. Did you notice the pressure rise at the end? That would be the solenoid snapping shut.
Now I will explain what I think is happening. …See if you feel it makes logical sense.
In the first shot when you switched on the machine, it started autofilling the boiler, or trying to…It could only get a little bit in, It reached the probe tip eventually, the autofill has a timed overfill. Because the pump seems unable to make any pressure the fill rate is painfully slow, the group rate is slow to as it fights against the Gicleur (jet in top of group).
The group itself didn’t have a very powerful vent action showing the pressure within it is low. The pressure gauge is the first device after the pump, so if that’s low pump pressure output is low.
With the blind filter the machine probably stops trying to autofill and eventually you get a little pressure rise…but the pump can’t do much more than that.
The final video shows a very small amount of water from the boiler before it’s starts autofilling, proving that even those the pump ran and ran, it didn’t put very much in before. The probe tip must have been covered as the pump only trued to run after you drew water. your camera angle was very high, but clearly it took a really, really long time to fill. If that amount of water really had been going in, the boiler would have cooled down significantly, and it never did. so only a small amount of water went in. The camera was high, but I saw that small rise in the end when the solenoid snapped shut, so not sure if it was completely full or what happened…but the pump run on showed it incapable of making much more than a few bar.
So the question is why is the pump not able to make pressure? and I’ll bet the water level in the tank hardly drops when it does those long autofills.
- Inlet tube blocked
- pump inlet tube blocked
- Valve at bottom blocked, or blob of grease
- Pump has sucked in blob of grease or dirt and no longer works correctly
- Pump might just be nadgered (a highly technical term for failed)
One thing to try, is to disconnect pump tube from bottom of tank…check it’s clear……then put it in a glass of water and see what happens.
P.S. You have tried removing the softening filter haven’t you??