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Expobar Office Pulser won't stay hot
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yambu
Senior Member


Joined: 29 Apr 2014
Posts: 4
Location: Boston
Expertise: I love coffee

Espresso: Expobar Office Pulser
Grinder: Rancilio Rocky
Posted Tue Apr 29, 2014, 12:47pm
Subject: Expobar Office Pulser won't stay hot
 

I just purchased (but haven't yet received) a malfunctioning Expobar Pulser. According to the seller, the machine heats up, will pump hot water through the group head, hot water line, and makes steam. But it won't stay hot -- something is shutting the heating element off. A local shop told her it might be the pressurestat.

Question: Assuming this is not enough info to diagnose the problem, can anyone suggest or point me to a good troubleshooting routine, and recommend diagnostic equipment like pressure and temp sensors? All I have now is a digital multimeter. I'm reasonably handy.

I'm also interested in dialing in the right settings for quality brewing once I get it working -- so any recommendations are appreciated.

Thanks!
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,722
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Tue Apr 29, 2014, 1:13pm
Subject: Re: Expobar Office Pulser won't stay hot
 

HI and welcome.

You are correct, there is not nearly enough to go on here. You will need to open it up and follow the power through the machine. It is only slightly more complex than your home water heater so it should not be all that hard.

It could be a Pstat, a loose wire, or something else.

When you get the machine, let us know "what you got" :D

Until then, welcome, hang around, get to know us and do a lot of reading, there is a LOT of information here to keep you busy for a long time !

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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DanoM
Senior Member


Joined: 20 Mar 2013
Posts: 343
Location: Los Angeles
Expertise: I love coffee

Espresso: Bezzera Strega, '84 La...
Grinder: Compak K10, Kludge grinder,...
Posted Tue Apr 29, 2014, 2:42pm
Subject: Re: Expobar Office Pulser won't stay hot
 

I'll add that it could be the pressurestat or the thermo-reset switch.  When the thermosensor switch gets hot enough it will trigger like a reset switch.  Some of them reset automatically when the temperature drops low enough.

Until you get the machine it will be all guesses, but those are the first 2 items I would check if you experience this.
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Whitcoatsyndrom
Senior Member
Whitcoatsyndrom
Joined: 25 Apr 2013
Posts: 172
Location: Roanoke, VA
Expertise: I live coffee

Espresso: Expobar Office Pulser
Grinder: Baratza Vario
Drip: Newco-OCS 12
Roaster: HG/BM
Posted Tue Apr 29, 2014, 5:52pm
Subject: Re: Expobar Office Pulser won't stay hot
 

Just for motivation--I recently purchased a used Pulser and have been very very happy with it.  It is a very capable espresso machine and and I've been impressed with the quality of it.  One of the benefits is in its simplicity...brew on, or brew off.  If you're having any doubts, it's well worth investigating to get it working properly.  Although I'm not endorsing them (or saying anything negative), Whole Latte Love is the primary retailer of Expobar in the US (both machines and parts).  I've called their maintenance line before and they've been helpful despite not selling me the machine (I had to replace a pressure relief valve and although I could have used one from various manufacturers, I wanted the OEM fitting and thought it was a prudent to purchase from those that gave me advice).  

I've accumulated some decent info on the company through searches and through the help of other CG members; more than happy to pass it your way if interested.  

If you don't mind me asking, what did you get the machine for?
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yambu
Senior Member


Joined: 29 Apr 2014
Posts: 4
Location: Boston
Expertise: I love coffee

Espresso: Expobar Office Pulser
Grinder: Rancilio Rocky
Posted Tue Apr 29, 2014, 6:40pm
Subject: Re: Expobar Office Pulser won't stay hot
 

Thanks all, for the encouragement. I've had a Gaggia Espresso for years (originally from WLL) and have finally outgrown it. Looking forward to the various advantages this machine offers, once I get it repaired.

@Whitcoatsyndrom, in answer to your question, for the Pulser "as-is" I paid about $350 plus shipping -- hopefully that will turn out to be a good deal! Aside from this problem, it looks like it needs a cover for the water tank.
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Whitcoatsyndrom
Senior Member
Whitcoatsyndrom
Joined: 25 Apr 2013
Posts: 172
Location: Roanoke, VA
Expertise: I live coffee

Espresso: Expobar Office Pulser
Grinder: Baratza Vario
Drip: Newco-OCS 12
Roaster: HG/BM
Posted Wed Apr 30, 2014, 1:25pm
Subject: Re: Expobar Office Pulser won't stay hot
 

(The Pulser was the machine I got after a Gaggia Classic as well.  You'll definitely enjoy the temperature stability of the e61 style head.  Also, if you are referring to a cap (for lack of a better word) that would cover the mouth of the water tank--then there isn't supposed to be one.  If there was, then mine was missing it as well and they left it out of the parts diagram (Click Here (www.wholelattelove.com)).  One wouldn't want to create a vacuum by sucking water volume out a closed tank, so there would have to be holes in the cap anyway.  If you're talking about the metal top-cover of the machine that one would rest cups on and remove to fill the water tank...then yeah you'll want a new one to prevent stuff from flying in your tank.  

Look forward to hearing about it when you get it!
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yambu
Senior Member


Joined: 29 Apr 2014
Posts: 4
Location: Boston
Expertise: I love coffee

Espresso: Expobar Office Pulser
Grinder: Rancilio Rocky
Posted Wed Apr 30, 2014, 5:20pm
Subject: Re: Expobar Office Pulser won't stay hot
 

Ah, that clears up some confusion, as I'd checked the diagram and didn't see anything that looked like a lid. I guess it's missing the top plate.
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yambu
Senior Member


Joined: 29 Apr 2014
Posts: 4
Location: Boston
Expertise: I love coffee

Espresso: Expobar Office Pulser
Grinder: Rancilio Rocky
Posted Mon May 5, 2014, 12:19pm
Subject: Re: Expobar Office Pulser won't stay hot
 

Whitcoatsyndrom: The machine arrived. I haven't gotten to diagnosing the temperature problem, but am a bit puzzled at what part is missing on top, as the top of my machine and water tank don't look like those in the diagram. I'm guessing it's a slightly different (perhaps earlier) model, as it looks similar otherwise. (See photo attached of top, still in box). Note that there's a single perforated stainless plate (rather than 2), and it fits perfectly around the tank rather than over it. (The tank has a lip that allows it to be supported by the plate). Also, there's nothing under it, so it's not meant to be removed to fill the tank.

It appears to be designed for some sort of lid that just fits right on the tank. The tank's open to the air below where the plastic tubes enter through the side (so there wouldn't be any vacuum issue as you suggest). I'll ask WLL about this too, once I've done some diagnostics on power.

yambu: IMG_1446.jpg
(Click for larger image)
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