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Rancilio s20 midi de
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dqts
Senior Member


Joined: 12 Nov 2011
Posts: 53
Location: Federal way, wa
Expertise: I love coffee

Espresso: Rancilio S20 midi de
Grinder: Cunill Brasil, Capresso...
Vac Pot: bodum 8 cup
Drip: Chemex, kyoto
Roaster: us roaster corp 1 lb
Posted Mon Feb 25, 2013, 1:57am
Subject: Rancilio s20 midi de
 

I have what the title states. Recently one group head started only emitting steam no water, I don't know much about restoring machines so I am hoping someone here does.

Cheers
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fnacer
Senior Member


Joined: 25 Feb 2007
Posts: 465
Location: Denver
Expertise: I love coffee

Espresso: Salvatore E61, Vivaldi Mini...
Grinder: Mazzer Mini, Gaggia MDF,...
Roaster: Behmor 1600
Posted Mon Feb 25, 2013, 9:53pm
Subject: Re: Rancilio s20 midi de
 

Is the pump turning on when you attempt to pull a shot? If so, does it sound the way it always has? And if so, do you see any water going into the drain pan?
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dqts
Senior Member


Joined: 12 Nov 2011
Posts: 53
Location: Federal way, wa
Expertise: I love coffee

Espresso: Rancilio S20 midi de
Grinder: Cunill Brasil, Capresso...
Vac Pot: bodum 8 cup
Drip: Chemex, kyoto
Roaster: us roaster corp 1 lb
Posted Thu Mar 7, 2013, 4:42pm
Subject: Re: Rancilio s20 midi de
 

Just got around to checking it. It does turn on. Sometimes a small amount of water comes out but it's mainly steam. Water does come from the drain tray when it is on. The second group head has no problems.
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fnacer
Senior Member


Joined: 25 Feb 2007
Posts: 465
Location: Denver
Expertise: I love coffee

Espresso: Salvatore E61, Vivaldi Mini...
Grinder: Mazzer Mini, Gaggia MDF,...
Roaster: Behmor 1600
Posted Mon Mar 18, 2013, 8:43pm
Subject: Re: Rancilio s20 midi de
 

If you mean that water is going into (rather than from) the drain pan when you try to pull a shot, then you may have an obstruction in the heat exchanger. Most of the water pumped into the exchanger gets diverted to the drain and what little makes it through gets super-heated and turns into steam.

The obvious first step is to descale the heat exchanger.
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