Greetings all - I have noticed a funny noise from machine last week or so and on inspecting internally today noticed what I think is the problem. One of the tubes appears to have a hole - no idea how this has happened but here we are. Am I right in thinking this is the steam boiler? Any clever ideas how to fix?? Looks like it will be a PITA to swap out the piece of tubing. Thanks in advance for any help [URL=https://i.imgur.com/zODkKpD.jpg][IMG]https://i.imgur.com/zODkKpD.jpg[/IMG][/URL]

@"Ando"#p39218 - They are push fit, so very easy. But are you sure it's a hole? It's not very clear from the picture - At least I can't see it. See: https://www.youtube.com/watch?v=uZ4LWcI6cn4 Watch from 3:00 and it show you how to remove it. So you could buy some PTFE tubbing (from ebay) and, as long as they are the same outer diameter and inner diameter, you should be good. Question: With the machine open, steam boiler on and at full pressure... If it's a hole, them steam will be escaping from it. Can you confirm this?

If it is a hole , and as mrs said it’s not very clear, I’d see if there is enough slack in the tube to cut the holed bit off and reinsert the tube into the fitting.

> @"Waitforme"#p39226 If it is a hole , and as mrs said it’s not very clear, I’d see if there is enough slack in the tube to cut the holed bit off and reinsert the tube into the fitting. Exactly, if there is not enough slack, you can buy 1 metre of tubing from ebay…just measure the ID and OD to calculate wall thickness, you want PTFE tubing.

Thanks very much all. I put my finger close to it when it was heating up today - v hot! Then once up to temp it was ok. There should be enough slack so will get on that soon. Just out of interest - what is that parts purpose?

@"Ando"#p39231 That brings hot water from the steam boiler into the brew boiler when the hot water tap is open. Also used to pressurise the brew boiler when using "steam pre-infusion". Can you confirm this? "With the machine open, steam boiler on and at full pressure… If it’s a hole, them steam will be escaping from it. " > @"Ando"#p39231 Then once up to temp it was ok. the hole will not magically close itself up when the machine is up to temp....

There’s no visible steam - just a weird hissing noise. When I put my finger over it it hurt whilst heating up - but tried again once up to temp and nothing. I noticed one morning last week that the steam pressure dropped whilst I tried to steam at same time as making a coffee (I rarely do this but was in a rush). That and the weird noise caused me to investigate today. Will do further investigations on Sunday / Monday and report back (going away for weekend)

@"Ando"#p39237 - good stuff. Try a dental mirror or a spoon and see if there’s visible condensation/water. Unless I’m mistaken, if the boiler is at full temp and approx. 2 bar pressure, then if there’s a hole in that pipe water should be squirting out of that as it has otherwise nowhere else to escape. I’m not saying there isn’t an issue, but you might be barking at the wrong tree.

@"Ando"#p39218 if you can upload an unlisted video to youtube and link to it here, it might be helpful

So to update on this - there is no hole in the tubing, it’s just black marking that you can see in the video posted earlier by MRS. It’s escaping from just under the bit that you push to insert the tubing. Will this just be a case of replacing that part u think?

> @"Ando"#p39738 It’s escaping from just under the bit that you push to insert the tubing. > Will this just be a case of replacing that part u think? Should just be able to remove it from the boiler, clean up the threads, wrap with PTFE tape (probably 7-10 turns) and then replace it. **When removing, get a spanner on it and try to shock it off (sharp knocks with a heavier object), not torque it off.**

L Elizabeth - Minor Issue

Ando

I should add - this leaking happens when it’s heating up. It stops once up to temp.

DavecUK

Ando You may need to replace the brass john guest type fitting.

Ando

DavecUK Will try source one.
Thanks for helping.

jcb1973

Same problem on mine - part is MC935F Quick Joint

This forum is an inspiration. First leakage issues, and no panic. I imagined a @DavecUK character standing next to me and asking what investigations I had done, with a reassuring voice asking me to show the inside of the machine, that the leak should be pretty obvious. Top off, spot the issue almost immediately. Quick read of forum and find similar issue, identify part… Part is in stock at local retailer, off there tomorrow morning.

Ando

jcb1973 Nice one! Once new part was put in it resolved the problem, machine running well again.
Agree re forum being very helpful!

jcb1973

Same - a very quick fix. All working again!

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