Question about Pasquini Livia 90 Espresso Machine

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Tooo much pressure

My Livia 90 has started building up too much pressure in the tank. It reaches about 2 and then the mechanical relief valve suddenly pops and releases enough steam to bring it back down to less than 1.5. Whatever is supposed to happen to prevent it from building up that much pressure is not working.

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If you remove the top panel on the machine there is a pressure stat on the right side, with 2 wire connections going to it. That P.stat could be damaged and needs to be replaced, or the pipe to the P.stat is clogged and it cannot read the boiler pressure.

Posted on May 14, 2009

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Posted on Jan 02, 2017

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2 Answers

POP OFF VAVLE ON HEAD KEEPS POPPING UP


The over-pressure relief valve may be defective if the valve is opening before the desired tank pressure is reached. If not, then the shut-off pressure adjustment (if there is one) may be set wrong. You'll need to find out from the manufacturer exactly what static tank pressure the compressor is designed to provide and then determine if it is working correctly. If so, then the relief valve might be defective. DO NOT attempt to defeat the relief valve under any circumstances - it can result in compressor damage or a dangerous tank failure.

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AIR COMPRESSOR BUILDS PRESSURE IN OIL COMPARTMENT AND LOCKS UP COMPRESSOR MUIST RELEAVE ALL AIR BEBORE IT WILL START AGAIN


Have a look at the check valve (you will find it between the pressure switch and the tank) Make sure there is no pressure in the tank before you remove it!!! There should be a spring and and rubber or plastic valve in there. Clean it up, or if necessary, replace it. Otherwise, you may need to check the valves in the head, if the are not seating properly then you will get the air passing through. It is very irregular for the air to get passed the piston rings in the pump, but try those things and post on here to let me know how you get on

Thanks
Carl

Sep 24, 2012 | Air Tools & Compressors

3 Answers

Is the reed valve part of the pressure switch


relief valve should only open in a over pressure condition. If it is opening prior to reaching pressure ....replace it.

May 21, 2012 | Air Tools & Compressors

1 Answer

I have an older Pasquini Livia purchased in the early 90s. It continues to heat up and then the relief valve goes off. Is there a thermostat to replace?


Yes, remove the top panel on the right side is a p. stat with a microswitch on top, either that has to be replaced or the tube is blocked and it cannot read the steam pressure.

Nov 10, 2011 | Pasquini Livia 90 Espresso Machine

1 Answer

This Livia 90 has been working beautifully for the last 5 years. Suddenly, the water does not heat up. The needle on the temperature gage reaches the point just before the red marking and then gradually...


Hi
If you open the steam knob before you turn the machine on and it heats up normaly, you need to replace the vacuum breaker valve on top of the boiler. Its the 3/4 hex nut with the little brass pin in the center. If its is stuck closed when the machine is turned off, its holds pressure in the boiler, so when you turn the machine on again it starts to heat up but reaches pressure fast and turns the element off before it heats up all the way.

Apr 25, 2011 | Pasquini Livia 90 Espresso Machine

3 Answers

Compressor runs to 175psi but trips pressure relief when pressure drops tries to restart motor but motor wont turn blows breaker. changed whole pressure switch have same problem.


The problem is lilkely the check valve between the compressor and the tank -- it is alowing pressure to build from tank to compressor preventing the compressor from turning over. Clean, maybe replace, check valve...

Charlie

Jan 09, 2011 | Craftsman 25 gal Air Compressor 3 12 hp...

1 Answer

Turned machine on - it went up to temperature - then it sort of "exploded" spraying water and from all sides of the machine - tripped the outlet fuse - I turn the steam knob and let all the pressure out. ...


Hi
That is the pressure relief valve blowing, and it can be scary. the problem is the pressurestat is sticking. You just need to replace the pressurestat. that controls the pressure in the boiler. You can adjust the to any pressure but the correct pressure is the light should go out at 1.1 on the gauge but the pressure will continue to about 1.2 on the gauge. If it hits 1.4 the pressure relief will blow. This is really a safety precaution to prevent the boiler from exploding, so don't try adjusting the relief valve.

Sep 14, 2010 | Pasquini Livia 90 Espresso Machine

1 Answer

The machine does not produce water and makes loud ticking noise- pressure gauge spikes and release valve blows. What do you think is causing that-


Hi
That sounds like a couple of problems. For one the pressurestat is sticking and causing the pressure relief valve to release steam pressure. The second one is your probes are getting scaled and causing eratic water level senseing. They need to be cleaned. Replace the pressurestat first.

Jun 15, 2010 | Pasquini Livia 90 Espresso Machine

1 Answer

My Livia 90 dosn't build pressure


Clean out the shower screen and the diffuser under the grouphead, turn the head on without the screen and diffuser, if water flows strongly then the problem was in the diffuser and screen, if you have no flow, then the line to the haed is clogged.

Jun 18, 2009 | Pasquini Livia 90 Espresso Machine

2 Answers

Pasquini. Livia 90 intermittently building up too much pressure


The part that will solve your problem is an upgraded heating rewire kit which will control pressure electronically, not manually. The rewire kit is Part #90000, $28

You may also need a new micro switch which is connected to your PStat with the rewire kit. The micro switch part #7633905, $13

These parts are in stock. I can send you these parts and instructions to install these parts in your machine.

My experience is working over 10 years at Pasquini as a master technician running the home repair sales and service center.

I stock all Pasquini parts for any service of your Pasquini espresso machines and grinders. Contact us for any of your Pasquini sales and service needs.

May 21, 2009 | Pasquini Livia 90 Espresso Machine

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