Basically, when I turn the machine on the pump will run for about 4 seconds and then the no water light comes on. I try again and then water comes out the safety valve after a few seconds. Any suggestions?
I contacted Chris' service department and he didn't think it was the 2 way solenoid autofill valve.
Yes, it is a very good place to start. If scale builds up on the end of the fill probe then the machine keeps adding more water until it gets above the scale which leaves less and less space for pressure. Before unscrewing the probe be sure to note how much is sticking up since it is adjustable for depth. If it is cover in scale clean it up so you can perform a full descale on the boiler, HX and group.
Coffeenoobie Senior Member Joined: 11 Dec 2011 Posts: 3,075 Location: PNW Expertise: I like coffee
Espresso: N S Oscar Grinder: K30 & Vario W
Posted Tue Jan 15, 2013, 12:27pm Subject: Re: NS Oscar problem. Leaking from safety valve.
Mark how high the probe is before removing he means. You can't tell anything from the outside about the probe. Just mark the level so you can put it back in the same way. Cleaning the probe is recommended by NS when I talked to them, they said sand paper after I asked "do I soak it in descaler?". I have not done it yet but will when I do my tear down that I hope to start in a week or 2. Need money to order the parts for the steam wand update mod.
Your tag should have a date on it. Mine does but the rivet holding it on goes over the date.
Anyway, I have trained my car guy to believe there is something wrong with my car when I tell him it sounds funny. I listen to machines and modem handshakes.... Maybe there is something wrong with me.
Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.
Markarian Senior Member Joined: 27 Jun 2012 Posts: 658 Location: Seattle Area Expertise: I love coffee
Espresso: ECM Technika IV Profi WT-WC Grinder: Baratza Forte AP, HG One Vac Pot: Bunn Trifecta MB Drip: Moka, Aeropress, Hario V60 Roaster: Behmor 1600
Posted Tue Jan 15, 2013, 1:02pm Subject: Re: NS Oscar problem. Leaking from safety valve.
Helen, my Oscar is similarly missing a date tag and the only way I got any idea how old my machine was was when I (likely unnecessarily) replaced the pump. The original pump had a 2005 date of manufacture. Given that he has the older neplax valve and the red hoses, I'm willing to guess his machine is at least 7 years old.
With regard to the probe, as far as I've known its default state is always pushed all the way in. That's how it seems to look on mine and every other Oscar I've seen pictures of.
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