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.
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 !
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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.
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?
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.
(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.
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.
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