Hi all,

I had this Vetrano for a couple of years now. It is used daily for the morning coffee without a hitch until I returned from a weeklong trip last week.

When turned on the machine the next morning after returning home the pump will not stop running when the machine (power switch) is turned on. It is hooked up to fresh water supply and I verified the supply is there. I suspect that the pump continue to run is likely caused by a mechanical sensor switch (such as the pressure switch) probably got stuck due to the 7-days of disuse.

I've not study up on how Vetrano electrical and mechanical work. I would appreciate a pointer or too to where I may find a electrical schematic or your insight into what are the likely cause. I am quite capable of diagnosing and work safely with electrical/mechanical appliances repair. Just need some help to get started. Your help is much appreciate.

When was the last time you descaled? Is it filling the boiler, or running water through the group?

Hi Allon. I was afraid someone going to asked about when I last descale.
Never. I have been wanting to but was discouraged with the difficulty of this pump-in machine with very small inlet plumbing diameter. I read a few conflicting procedures and could not figure out the safe and proper descaling procedure. I read that Vetrano pump may not be able to pump a descaling solution if the inlet is not under pressure due to the very small inlet plumbing diameter.

The water is filling the boiler and the water is coming out of the group head when I activate the brew lever.

I'm unfamiliar with this machine, but I would guess that the boiler level sensor is stuck/scaled up.

Descale. I know there's a thread around here somewhere

Refer to my Izzo Alex II brew pressure post a few days ago.
Essentially check your brew level switch. Turn the machine off, remove the brew level, turn machine on. See if your pump turns on.

Your boiler fill solenoid is "stuck" closed. This is NOT an uncommon problem.

Remedy - assuming this is the problem:

Power off and unplugged.
Water supply shut down.
Syphon water from boiler.
Unscrew top half of valve and soak components in vinegar for 30 minutes.
Rinse well and reinstall.

Disconnect one lead to the heating element.
Power up machine - pump should run for about 20 seconds (my HUNCH).
Reconnect heating element.

Good to go.

Hi Eric. Thanks for your tips. I check the top of the boiler for the sensor. There are 2 sensor. One with 2 blue leads which I infer is likely the over temp sensor. It has a red plastic thingy in the between the contacts. The other sensor only has 1 black lead.

Can you please advise if the fill solenoid is the one with the single black lead?

No. That component with the black lead is the water level probe.

Here is the boiler fill solenoid:



This is Anita but V is similar.

Under normal circumstances, when you power up ANY hx machine, the water level is contracted. This initiates a fill action - the pump comes on and the fill solenoid valve opens simultaneously. The pump operates for a couple of seconds and all is well.

In your case (assuming I'm correct), the solenoid valve fails to open but the pump runs - your brew pressure gage should read ~ 9.0 bar during this unfortunate event.

While not necessarily obvious to you, there can be a couple of reasons why the solenoid valve does not open:

a. no power
b. failed solenoid coil
c. stuck valve

These are, for sure, possibilities but the most common cause is a stuck valve fixed by my previous post.