Londinium Constant Hissing (2014 L1)

Allen Geddes

Hello all,

When I went to use my L1 this morning, I heard a constant hissing coming from inside the machine. I took the top and side panels off, but was having a difficult time pin-pointing exactly where it was coming from. (Video below)

I'm wondering if it's the same issue reported here:

https://londiniumespresso.com/forum/londinium-i-owners-forum/664-hissing-from-pressure-relieve-valve?start=0

But please let me know if anybody has any thoughts or suggestions. Thanks!

-Allen

Frans Goddijn

Looks like one of these two, but the camera wobbles and moves around too much to see ;-)

Attached files

Allen Geddes

Thanks Frans - yes, sorry about the video quality. I was trying to hold a flashlight while taking the video, all before having had my morning coffee..

Frans Goddijn

Oh yes that's seriously challenging ;-)

Reiss Gunson

your need the londinium factory tool to solve that problem (image attached). place one end to your ear and move the other end to the suspected location of the leak

Allen Geddes

Thanks Reiss! Using that specialized tool, I was able to pin-point the source of the hissing to this valve (image attached).

I'm going to try and follow some of the troubleshooting tips here to see if I can resolve the issue without replacing the valve.

https://londiniumespresso.com/forum/londinium-i-owners-forum/664-hissing-from-pressure-relieve-valve?start=0

Attached files

Allen Geddes

I fiddled with the safety valve, attempting to turn it 1/3 to 1/2 turn, and I also lifted it, turned it, and released, and was not able to get it to "re-seat" and stop the steam from escaping. I was only able to stop the hissing when I applied light pressure DOWN on the valve nipple.

So I'm thinking this means I need to replace the safety valve with this part:

SAFETY VALVE:
https://londiniumespresso.com/store/index.php?route=product/product&product_id=143

Using this to seal the threads:

LOXEAL 55-03:
https://londiniumespresso.com/store/accessories?product_id=67

And while I'm at it, I'm thinking about replacing my 20A Pressure Switch with this 30A switch:

30 AMP SIRAI PRESSURE SWITCH:
https://londiniumespresso.com/store/index.php?route=product/product&product_id=139

Am I correct in assuming this will work with my machine? (2014 L1)

Is there anything else I should look into replacing on a 6-year old machine that is going to probably need replacing at some point? I replaced the piston seals last year and think I'm good to go on those for a while.

Thanks again for your help everyone!

-Allen

Reiss Gunson

hi allen

apologies for the delayed response

yes you are correct on all counts - we now fit the 30A pressure switch as standard to all models and you are right to replace the safety valve and anti vac valve at the same time

the safety valve is a new design too

kind regards


reiss

Reiss Gunson

also check the back of the on/off switch for any signs of heat from the contacts - if there is any blackening we now have an uprated on/off switch too, even though it looks almost identical the specification is different

kind regards

reiss.

Allen Geddes

Okay great, thanks Reiss!