It happens most commonly when you're steaming too, so if you were just pulling shots, it would be unusual for it to switch. I can pull shots for a long time without any switching, but mix in a little steam...
I also had a point where the vacuum breaker on the steam boiler was crusty, and leaking just a touch (slight hissing from the back left of the machine). That allowed steam to escape which also made the boiler need to be topped of more often (thus causing more frequent switching). Maybe have a look at that too. b On Sep 25, 2011, at 7:38 PM, [email protected] wrote: > Thanks to you both. Pulled six shots today and what i described did > not happen again. I will keep an eye on it for now. > > Pete > > On Sep 25, 10:23 am, Benjamin McCafferty <[email protected]> wrote: >> Good to know William. On the flip side, when I switched from vibe to >> rotary, this symptom didn't change, i.e. it will still switch back and >> forth. So I'm guessing we may be seeing two related things in action. >> b >> >> On Sep 25, 2011, at 8:55 AM, william mckenzie wrote: >> >> >> >>> I just replaced a pump that had deteriorated to the point where it was >>> happening every few seconds. It still occurred at least once per brew >>> cycle, and then for unrelated reasons I dialed the brew pressure down to 9 >>> from 10 and the problem seemed to go away. >>> Sent via BlackBerry by AT&T >> >>> -----Original Message----- >>> From: Benjamin McCafferty <[email protected]> >>> Sender: [email protected] >>> Date: Sun, 25 Sep 2011 08:12:39 >>> To: <[email protected]> >>> Reply-To: [email protected] >>> Subject: Re: Pump Switching >> >>> Hi Pete, >>> After watching this closely many many times, I concluded that Ira was right >>> and that it is just the pump switching over to fill the steam boiler as it >>> gets depleted, then switching back to the brew cycle. I can't say for sure >>> if this changed from new, i.e. if the sensor for the steam boiler has >>> gotten more sensitive, etc. Also have never figured out if it makes any >>> difference to the quality of the shot--it's not dramatic in any case, but >>> may be a little better when you just pull a shot without using steam at the >>> same time. >> >>> One obvious solution is to pull your shot either before or after steaming, >>> but that was unacceptable to me, since it defeats one of the main purposes >>> of a double boiler machine. >> >>> best, >>> bmc >> >>> On Sep 24, 2011, at 8:30 PM, [email protected] wrote: >> >>>> Hello Everyone, >> >>>> I noticed something peculiar tonight that I wanted to mention to the >>>> group. About 20 seconds into my shot, I heard a 'click'. The brew >>>> pressure then dropped to zero and shot back up to 9 bar - all within a >>>> second or two. I understand that this probably has to do with the brew >>>> boiler filling with water - but it has never happened during a shot >>>> before. I remember Ben McCafferty mentioning that he had the same >>>> issue back on March 23 (he used the same subject heading as above). >>>> Any ideas as to what this might be? >> >>>> Pete >> >>>> -- >>>> You received this message because you are subscribed to the Google Groups >>>> "Brewtus" group. >>>> To post to this group, send email to [email protected]. >>>> To unsubscribe from this group, send email to >>>> [email protected]. >>>> For more options, visit this group >>>> athttp://groups.google.com/group/brewtus?hl=en. >> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Brewtus" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group >>> athttp://groups.google.com/group/brewtus?hl=en. >> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Brewtus" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group >>> athttp://groups.google.com/group/brewtus?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "Brewtus" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/brewtus?hl=en. > -- You received this message because you are subscribed to the Google Groups "Brewtus" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/brewtus?hl=en.
