<p>I have an 8 months old Delonghi ecp3420 that one day decided to stop working properly. Instead of producing nice crema, the espresso comes out lukewarm and flavorless. Also, when running the machine without the coffee basket, water is trickling down very slowly - much more slowly than before. I also compared with videos I found online of the machine, so I know what to expect, more or less.</p>
<p>I did some research (including on this Stack channel) and realized the problem can be the <a href="https://coffee.stackexchange.com/questions/2508/espresso-drips-out-slowly">grind</a>, descaling, <a href="https://www.ifixit.com/Answers/View/292861/Constant+Dripping+from+diffuser" rel="nofollow noreferrer">the valve spring</a>, the pump or the temperature.</p>
<ol>
<li>Using fine grind or more coarse grind does not make a difference.</li>
<li>Descaling did not help (I tried to descale a few times using both vinegar and that expensive descaler fluid Delonghi sell).</li>
<li>Cleaning did not help. I cleaned every piece of this machine using descaler fluid.</li>
<li>Debugging this further, I found out that stretching the valve spring helps. When I do that, water seems to be flowing normally and the espresso comes out great.</li>
</ol>
<p>However - after I run the machine a few times, it goes back to not working properly: water is slowly dripping, and the espresso comes out flavorless. Stretching the spring again helps for a while.</p>
<p>What am I doing wrong? Stretching the spring every week doesn't seem like a good solution to me. Could it be related to the pump, after all? I would appreciate any advice you may have.</p>

CC BY-SA 4.0
2022-05-27T14:04:26.193Z
Have you tried replacing the spring?
DavidPostill
CC BY-SA 4.0
2022-05-27T18:53:19.213Z
Thanks. I have not, since it seems to be in very good condition. I'll order a new spring, I guess. Nothing left to lose at this point
liorr
CC BY-SA 4.0
2024-02-07T05:24:42.390Z
There is a 4mm valve seal also that has a tendency to degrade over time. It's more likely that's your problem than the spring.
R Mac
<espresso><espresso-machine><troubleshooting>
No pressure in Delonghi ecp3420 coffee machine
liorr
# No pressure in Delonghi ecp3420 coffee machine

(Asked by: username_0 on 2022-05-26)

I have an 8 months old Delonghi ecp3420 that one day decided to stop working properly. Instead of producing nice crema, the espresso comes out lukewarm and flavorless. Also, when running the machine without the coffee basket, water is trickling down very slowly - much more slowly than before. I also compared with videos I found online of the machine, so I know what to expect, more or less.

I did some research (including on this Stack channel) and realized the problem can be the [grind](https://coffee.stackexchange.com/questions/2508/espresso-drips-out-slowly), descaling, [the valve spring](https://www.ifixit.com/Answers/View/292861/Constant+Dripping+from+diffuser), the pump or the temperature.

1. Using fine grind or more coarse grind does not make a difference.
2. Descaling did not help (I tried to descale a few times using both vinegar and that expensive descaler fluid Delonghi sell).
3. Cleaning did not help. I cleaned every piece of this machine using descaler fluid.
4. Debugging this further, I found out that stretching the valve spring helps. When I do that, water seems to be flowing normally and the espresso comes out great.

However - after I run the machine a few times, it goes back to not working properly: water is slowly dripping, and the espresso comes out flavorless. Stretching the spring again helps for a while.

What am I doing wrong? Stretching the spring every week doesn't seem like a good solution to me. Could it be related to the pump, after all? I would appreciate any advice you may have.

**Tags:** espresso, espresso-machine, troubleshooting

> **Comments:**
> **username_1**: Have you tried replacing the spring?  
> **username_0**: Thanks. I have not, since it seems to be in very good condition. I'll order a new spring, I guess. Nothing left to lose at this point  
> **username_2**: There is a 4mm valve seal also that has a tendency to degrade over time. It's more likely that's your problem than the spring.  

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## 0 answers

