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Thermostat problem with Expobar Pulser - repair shop in the Bay Area?
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Heinzr
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Joined: 24 Mar 2005
Posts: 3
Location: Bay area, California
Expertise: I love coffee

Espresso: Expobar, la Valentina...
Grinder: Mazzer Mini
Posted Thu Mar 24, 2005, 5:28am
Subject: Thermostat problem with Expobar Pulser - repair shop in the Bay Area?
 

The hi limit switch of my 2 year old Expobar Pulser was triggered three days in a row, and I am getting nervous to continue to reset it.
Is anyone aware of a repair shop in the Bay area, that could check the machine and repair it?
Thanks, Heinz
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Corsican
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Corsican
Joined: 30 Nov 2003
Posts: 109
Location: San Francisco
Expertise: I live coffee

Espresso: ECM Cellini Premium
Grinder: Mazzer Mini
Drip: Melitta Ceramic Cone
Posted Thu Mar 24, 2005, 7:34am
Subject: Re: Thermostat problem with Expobar Pulser - repair shop in the Bay Area?
 

Are you referring to the pressure-stat (controller) ?  If so,  it is a do it yourself kind of job fairly simple. I have done it myself a couple of times for a  some friends. I live in the Bay area and if I can be of any help let me know.

Robert Pietri

 
Life is a one way trip, so be sure to enjoy every second of your journey !!!!!!
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Heinzr
Senior Member


Joined: 24 Mar 2005
Posts: 3
Location: Bay area, California
Expertise: I love coffee

Espresso: Expobar, la Valentina...
Grinder: Mazzer Mini
Posted Fri Mar 25, 2005, 6:42am
Subject: Re: Thermostat problem with Expobar Pulser - repair shop in the Bay Area?
 

Robert,
thanks for your willingness to help! As for your question: I do not know, to be honest.
Here is what happened: last week the machine would not warm up after being switched on. I contacted Wholelattelove, where I had bought the machine, and they recommend to reset the 'hi limit switch', which I did. And it worked - sort of. I was able to prepare a shot, but  noticed that the machine seemed to produce more steam (I did not really mind, since that made frothing a bit easier).  And after being switched of, the machine I was not able to start the machine again. I reset the switch one more time, and the same thing happened.
Not knowing a lot about expresso machines, one possible explanation for me was that the machine is actually getting to hot (maybe due to a defect temperature sensor), which could explain why I saw more steam and the triggering of the hi limit switch.

Does that make any sense to you.

Best regards, Heinz
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Corsican
Senior Member
Corsican
Joined: 30 Nov 2003
Posts: 109
Location: San Francisco
Expertise: I live coffee

Espresso: ECM Cellini Premium
Grinder: Mazzer Mini
Drip: Melitta Ceramic Cone
Posted Fri Mar 25, 2005, 8:18am
Subject: Re: Thermostat problem with Expobar Pulser - repair shop in the Bay Area?
 

I am at a lost in this one.  Sounds like a different kind of problem than a pressure controller. Contact WLL again and see what they suggest. If a part needs to be replace, I still should be able to walk you through it or help you.

Robert

 
Life is a one way trip, so be sure to enjoy every second of your journey !!!!!!
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jrtATL
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jrtATL
Joined: 20 Feb 2004
Posts: 1,035
Location: Austin TX
Expertise: I love coffee

Espresso: Expobar Office Control
Grinder: Mazzer Jolly; Cunill...
Drip: Melitta Clarity
Roaster: Drum on a Weber grill; HG/DB
Posted Fri Mar 25, 2005, 8:35am
Subject: Re: Thermostat problem with Expobar Pulser - repair shop in the Bay Area?
 

Actually, this sounds like a problem I've had.  It likely is the pressurestat that's getting stuck "open."  This causes the heating element to run continuously, and eventually, the temperature on the outside of the boiler gets so hot that it trips the hi-limit switch.

You probably need a new pressurestat (pstat).  These are easy to replace, and are destined to fail within a couple of years of purchase.  Obviously, as you found out the hard way, some fail faster than others.

I am currently on my thrid pstat, and I have used the machine for only a year.  My problem was slightly different, in that I started off with both a defective pstat and heating element.  

Jeremy

 
"I've appeared before every court in the state.  Often as a lawyer." - Lionel Hutz, Esq.
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Heinzr
Senior Member


Joined: 24 Mar 2005
Posts: 3
Location: Bay area, California
Expertise: I love coffee

Espresso: Expobar, la Valentina...
Grinder: Mazzer Mini
Posted Tue Mar 29, 2005, 12:22pm
Subject: Re: Thermostat problem with Expobar Pulser - repair shop in the Bay Area?
 

Jeremy,
what is a source for a new pstat, and do they provide with instructions/schematics for how to replace it? I would really like to move forward on this -  this is giving a big boost to Pete's Coffee sales!
Best regards, Heinz
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jrtATL
Senior Member
jrtATL
Joined: 20 Feb 2004
Posts: 1,035
Location: Austin TX
Expertise: I love coffee

Espresso: Expobar Office Control
Grinder: Mazzer Jolly; Cunill...
Drip: Melitta Clarity
Roaster: Drum on a Weber grill; HG/DB
Posted Tue Mar 29, 2005, 3:54pm
Subject: Re: Thermostat problem with Expobar Pulser - repair shop in the Bay Area?
 

You can find a Mater pstat at EPNW, Chris Coffee, or WLL.  Should be under $40, IIRC.  Replacement is as easy as unplugging the machine, cooling it down, unscrewing the old pstat, and then screwing in the new pstat with some teflon tape.  Adjustments will then have to be made to get the pressure how you want it.

I just put a Sirai commercial pstat in mine, where the reservoir used to be (mine is plumbed in).  These retail for over $100, but can be found on the web for under $50 if you know where to look.  I can't post the link for fear of retribution.

Jeremy

 
"I've appeared before every court in the state.  Often as a lawyer." - Lionel Hutz, Esq.
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