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intermittent oscar issues
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Discussions > Espresso > Machines > intermittent...  
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joey
Senior Member


Joined: 24 Dec 2002
Posts: 341
Location: madison, wi
Expertise: I love coffee

Espresso: Oscar
Grinder: Mazzer Mini
Drip: Chemex
Roaster: Behmor
Posted Thu Jun 12, 2014, 3:07pm
Subject: intermittent oscar issues
 

I turned oscar off the other day and turned it back on a couple days later. When I turned it on, the element light came on, hummed for a few seconds, stopped humming, and then the element light shut off and low water light came on.  It did that every time i turned it on over the last few days.  Today I opened it up, checked gicar and didn't see any loose connections or anything glaring.  I flipped it back up, turned it on, same issue.  I left it on for a minute and the problem resolved its self.  Sort of.  Started heating then the low water light flicked on and off repeatedly.  It did that for a while then came up to temp.  I turned it off and its back to not warming up.  Is there something I can check?  The machine has a connector between the water sensor wires and a gallon jug with a tube for the water line.  I posted a video to youtube
Pump runs fine if I disconnect sensor from top of boiler.  Water will dispense if i brew button is depressed before i press power but stops when low water light turns on.  I just pressed the power button on and off repeatedly and it started warming up.  Low water light flickering like in video intermittently as its heating up.
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DanoM
Senior Member


Joined: 20 Mar 2013
Posts: 381
Location: Los Angeles
Expertise: I love coffee

Espresso: Bezzera Strega, '84 La...
Grinder: Compak K10, Kludge grinder,...
Posted Thu Jun 12, 2014, 5:05pm
Subject: Re: intermittent oscar issues
 

Another Oscar Gicar controller failure?  Mine was something like that until it malfunctioned completely, didn't fill the boiler properly and burned up my element.  Total cost of replacements from espresso parts was around $210 for controller, element, gaskets.  (User JPBoyt also repairs the controllers.)

So...  I would be very careful.  If you can keep it from blowing your heating element that's $60 savings!

From what I have read, and what I saw in my own Oscar, the drain tubes for 3-way valve and OPV often come loose and no longer feed to the drain tray.  These can splash water inside, getting the controller wet, and eventually leading to early failure.  Check those drain lines to the tray and tweak them until they work cleanly when sliding the tray in and out.

Best of luck!
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plindy
Senior Member
plindy
Joined: 27 Nov 2002
Posts: 73
Location: Seattle
Expertise: Just starting

Espresso: NS Oscar
Grinder: SJ Pharos Lido HG-One
Posted Fri Jun 13, 2014, 3:01am
Subject: Re: intermittent oscar issues
 

electrical advice from some one on the net
want to be sure , new brain or JPBoyt

comfortable with soldering on your brain box and the liabilities there of
C1 = 220uf 50V  105c
not sure what our 220 friends would use , just read the info off the cap at C1

sounds like
the top of the cap should be flat

did one with on a board with a really burnt looking R3 relay
start up issues cured
YMMV

as DanoM  said be careful
things could go very wrong
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joey
Senior Member


Joined: 24 Dec 2002
Posts: 341
Location: madison, wi
Expertise: I love coffee

Espresso: Oscar
Grinder: Mazzer Mini
Drip: Chemex
Roaster: Behmor
Posted Tue Jun 17, 2014, 8:45pm
Subject: Re: intermittent oscar issues
 

I noticed the drain tube on the left is a little short and may be the culprit.  Replacing it is on the agenda.  Ill open up the box and see what i can see and go from there.  I dont think i have any confidence in soldering a circuit-all i've ever soldered was two wires together.
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,031
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sat Jun 21, 2014, 10:57am
Subject: Re: intermittent oscar issues
 

If it doesn't work, do you lose much by trying to fix it?  It seems to me you have little to lose and You might surprise yourself.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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