Breville Dual Boiler BES920XL - need pump repair help
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- Posts: 9
- Joined: 4 years ago
For 1 month I have had difficulties with my Breville Dual Boiler (BES920XL). At the end of the 8 seconds of infusion it does not start the extraction. It may take 10, 15 and even 30 seconds before you hear the sound of the solenoid valve. The pressure is ok, it reaches 9.5 bar. I live in rural Quebec and access to an authorized repairer is very difficult. A possible solution would be greatly appreciated. Aujourd'hui j'ai fait plusieurs expériences pour constater qu'après la 1ere extraction laborieuse, les suivantes se font de façon normale. L'appareil ouvert j'ai constaté que le petit tuyau qui va de la chaudière au selenoid pompe beaucoup d'air à la première extraction une fois bien amorcé il fonctionne normalement. Comment corriger ce problème?
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I keep missing and forgetting this, sorry.
I am having trouble following your description in words. Part of my confusion lies with the solenoid valve. It opens the moment you press the button. I think the sound you are listening for is the pump. It looks like Francais is your main language. Can you shoot a video clip and place it on youtube?
-Peter
I am having trouble following your description in words. Part of my confusion lies with the solenoid valve. It opens the moment you press the button. I think the sound you are listening for is the pump. It looks like Francais is your main language. Can you shoot a video clip and place it on youtube?
-Peter
LMWDP #553
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- Posts: 9
- Joined: 4 years ago
Hi,
I'll try to redescribe my problem. Since I purchased my Breville (5 years ago), the usual steps are:
- push the "MANUAL" button
- infusion (~1 second)
- pressure build up (~7 secs)
- extraction (~25 secs)
Since about a month, when the machine has been turned off for > 24h, the pressure build up takes from 15-45 secs. Then, the pressure build up, takes the normal ~7 secs.
I see the unusual ~45 secs for the pressure build up as a sign of degradation. Any idea which part is at fault? Is this a common problem?
Thanks,
I'll try to redescribe my problem. Since I purchased my Breville (5 years ago), the usual steps are:
- push the "MANUAL" button
- infusion (~1 second)
- pressure build up (~7 secs)
- extraction (~25 secs)
Since about a month, when the machine has been turned off for > 24h, the pressure build up takes from 15-45 secs. Then, the pressure build up, takes the normal ~7 secs.
I see the unusual ~45 secs for the pressure build up as a sign of degradation. Any idea which part is at fault? Is this a common problem?
Thanks,
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- Posts: 9
- Joined: 4 years ago
We turned off the machine for 24h. Here is the video: http://www.youtube.com/watch?v=3TKdFhZOQco
at 1 secs: We push the "MANUAL" button
at 2 secs: Pre-infusion
from 3 to 14 secs: Pressure build up (11 secs)
at 15 secs: Extraction begin
Then the second "extraction":
at 28 secs: We push the "MANUAL" button
at 29 secs: Pre-infusion
from 30 to 36 secs: Pressure build up (only 6 secs)
at 37 secs: Extraction begin
First infusion took 11 secs for the pressure build up, since I bought it it never takes more than 7 secs. Since about a month sometimes it takes 45 secs for the pressure build up part.
Thanks
at 1 secs: We push the "MANUAL" button
at 2 secs: Pre-infusion
from 3 to 14 secs: Pressure build up (11 secs)
at 15 secs: Extraction begin
Then the second "extraction":
at 28 secs: We push the "MANUAL" button
at 29 secs: Pre-infusion
from 30 to 36 secs: Pressure build up (only 6 secs)
at 37 secs: Extraction begin
First infusion took 11 secs for the pressure build up, since I bought it it never takes more than 7 secs. Since about a month sometimes it takes 45 secs for the pressure build up part.
Thanks
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- Posts: 4029
- Joined: 15 years ago
Can you make a couple of "runs" with a blind basket or a Breville basket with the silicone, blocking disc in it and see how fast pressure builds and if it builds repeatedly on the same time/pressure profile?
-Peter
-Peter
LMWDP #553
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- Posts: 9
- Joined: 4 years ago
Sorry for the delay in responding, and thank you for paying attention to the issue I am submitting. I therefore carried out 4 tests with the filter basket and the cleaning disc after 24 hours without use. The results are as follows: 1-18 seconds hits 10.5 bars in 5 seconds. 2- 7 seconds reaches 10.5 bars in 4 seconds. 3- 7 seconds reaches 10.5 bars in 4 seconds. 4- idem. The problem always presents itself on the first extraction so I cannot use the automatic programming function. Then everything goes back to normal. Thank you again for your attention!
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- Posts: 10
- Joined: 6 years ago
What preinfusion pump power are you using? I found kind of inconsistent results at the stock 60% value, but bumping it up to 70% made the pump kick in sooner and more regularly
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- Joined: 15 years ago
Thanks for pitching in. Due to the language barrier, I was (and still am) having difficulty understanding what the OP is asking.
-Peter
-Peter
LMWDP #553
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- Posts: 4029
- Joined: 15 years ago
Correct me if I am misunderstanding. I think you have said:Marc100 wrote:Sorry for the delay in responding, and thank you for paying attention to the issue I am submitting. I therefore carried out 4 tests with the filter basket and the cleaning disc after 24 hours without use. The results are as follows: 1-18 seconds hits 10.5 bars in 5 seconds. 2- 7 seconds reaches 10.5 bars in 4 seconds. 3- 7 seconds reaches 10.5 bars in 4 seconds. 4- idem. The problem always presents itself on the first extraction so I cannot use the automatic programming function. Then everything goes back to normal. Thank you again for your attention!
Test 1: hits 10.5 bar in 5 seconds
Test 2: hits 10.5 bar in 4 seconds
Test 3: hits 10.5 bar in 4 seconds
Test 4: "idem" I do not know what "idem" means
-Peter
LMWDP #553
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- Team HB
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[quote="Marc100"The problem always presents itself on the first extraction so I cannot use the automatic programming function. Then everything goes back to normal.[/quote]
This suggests that the water in the brew circuit is escaping while the machine idles at temperature. Because the boiler idles above boiling temperature, if the circuit isn't completely sealed the steam will just continuously expand and excape while the liquid water boils to replace it, it takes very little time for little Breville boilers to boil nearly dry if the leakage is enough to see.
Can you determine by touching components where the steam is escaping? Example, there should be no flow from the boiler backward through the pump. If the pump outlet fitting is hot when the machine is at idle, it is because steam is flowing that direction and backward through the pump, or backward through the checkvalve on the air-release valve if there is one.
This suggests that the water in the brew circuit is escaping while the machine idles at temperature. Because the boiler idles above boiling temperature, if the circuit isn't completely sealed the steam will just continuously expand and excape while the liquid water boils to replace it, it takes very little time for little Breville boilers to boil nearly dry if the leakage is enough to see.
Can you determine by touching components where the steam is escaping? Example, there should be no flow from the boiler backward through the pump. If the pump outlet fitting is hot when the machine is at idle, it is because steam is flowing that direction and backward through the pump, or backward through the checkvalve on the air-release valve if there is one.