Re: water leaking from steam wand when brewing shots
Try this from another post. It should help.
The steam wand began to seriously leak but a call to Starbucks Customer Service line and I was talked through how to adjust it so that the leaking stopped. It requires taking off the top/back panel of the machine (6 philips screws) then using a small allen key (1.5 mm I believe) to loosen and adjust a plastic oblong donut-shaped thing (a "cam" actually) on the shaft of the steam knob... no more drips. The key to prevent dripping is to open the steam knob without putting pressure on it when it gets to the full-open stop position. Cranking it too hard when it comes to a stop in the full-open position will slowly move the cam out of position. Then the shaft doesn't fully seat inside the machine anymore and won't fully shut off the water to the steam wand. Then, no matter how hard you crank the knob in the shut-off position it will still drip. The purpose of the cam is to stop the knob from complete unscrewing and it also turns the pump on and off for the steam wand. The cam adjustment is very small but completely solves the dripping problem. Seeing inside the machine made me realize how easy it would be to repair problems as long as I can get the parts from Starbucks or perhaps Saeco.
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First I'm not a Delonghi tech. But I have worked on similar table top "Super Automatic" machines. You should call your vendor for service as there is no customer serviceable parts in this machine.
*** the following is for information only. ***
* If your leaking at or under the water tank then check for crack or you may be missing a rubber seal, o-ring, or washer. Replace the whole tank as a unit.
* If your leaking into the dregs or drip tray then there is a problem with the brewing system. Call for service. They may need to replace the brew valve or PC board.
* If your leaking at the bottom, drip tray, or side only when the pump buzzes (pumping water) then there is a cracked or disconnected hose line or fitting. Call for service and replace.
* If your leaking when the steam wand is in use then there is a similar problem with the 2nd pump system. Call for service and replace.
* If your leaking liquid coffee into the dregs tray or drip tray. Then you have a worn or missing group gasket(s). Call for service and replace. (you may find gasket kits from Amazon.com or online.)
* Final; Leaking water and electrical equipment is not a good idea. Best to be safe. Unplug and call for service.
This is hard to picture. The only way water can come out the brew spout is if the brewing mechanism inside in the position to make coffee. The only way to get that mechanism into that position is to either select one of the three coffee buttons (you'd hear the grinder run, then you'd hear the motor putting the brew mechanism into place and then the pump start and water would then come out the brew spout. OR to select preground coffee and then select one of the three coffee sizes - in that case you wouldn't hear the grinder but you'd still hear the motor turn the brew mechanism into brewing position and then start the pump.
When you simply select hot water and then open the steam valve - I can't imagine any possible way for water to come out the brew spout.
Now if you mean that you don't see any water come out but water is leaking inside the cabinet and ending up in the drip tray - then that would mean a leak inside the machine. It could be the valve that the brew group locks into when it goes into brew position (you see this valve in a little recess behind the brew mechanism when you take the brew group out to clean it). Or it could be a leaking steam valve or hose inside.
You might try getting a flashlight and a cleaning brush - take out the brew mechanism and then clean around that little nozzle/valve that is in the recess just the left of center behind where the brew mechanism was. That valve should shut when you are not in brew position and not allow any water out - but it may be gummed up with coffee grounds.
If you are feeling brave - you would need a deep socket and a lot of patience with a small breaker bar (a ratchet head is too big to fit in there) and you can remove that nozzle/valve and then clean it or replace it. But it is very slow going to remove it (there must be some special tool they use at the factory). I had just the right size deep socket (like what you'd use for a spark plug in a car) but there wasn't room for a ratchet so I had to use a small breaker bar and I could only turn the valve about 1/4 turn at a time then I'd have to reposition the socket to do another 1/4 turn. It took 5-10 minutes to remove it - then it was easy to clean. I think you could clean it in place with a stiff bristle brush and some q-tips.
I don't know if that valve is the problem - but that's the only thing I can think of that would have your hot water and steam running into your drip tray instead of out the steam wand.
When the machine is done brewing some water is relieved into the drip tray. This is the pressure relief. Some coffee residue is also taken into the drip tray. This is normal. As long as nothing is under the machine your OK.
If you can get water to flow from the wand, you can descale the machine. You might have a bad steam boiler. There is also a fuse on the boiler that might be bad. Set your water hardness to 4 to keep the machine working for a long time. Descale more often than not enough.
If it only does that when you are brewing coffee, the only thing I can think of is the chamber under the white plastic valve. It would be the hose on the pump or else there would be water when using the steam or hot water cycle. Thats a tough one , the first thing I would check is the chamber under the valve, then if that is clean, I would open the machine to see if where else it would be from.
Sounds like the boiler is blocked, and machine needs to be descaled. Try this first remove the parnello if your machine has one on the steam wand then using a paperclip clear out the end of the wand, that might be blocked. If it isn't then run the descale to clear out the blockage in the boiler.
I had the same problem. The water was coming from the front door switch inside top right. I followed the water and turns out the part that needed to be replaced was the steam valve body. #48. http://www.shop.partsguru.com/images/1208344975339-771025787.jpeg and link http://www.shop.partsguru.com/images/1208344975339-771025787.jpeg after I changed it the pool of water under the machine stopped. I hope this helps.
If we're thinking about the same thing, then yes you're correct in saying this is a pressure release valve. It is perfectly normal for it to drip every time you make a shot. It should, however, drain into the stainless steel tray along with any drips from the steam wand or the filter group. The base that the tray sits in does have a hole in it under the release valve, which I think is for people who may have the machine set up on a drainer so the tray doesn't need emptying. You can also get water under the machine if you direct the steam wand towards the tray as it will force any liquid collected in the tray to shoot over the sides and out the underneath.