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Gaggia Classic -> brew thermostat problem?
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eliseujr
Senior Member


Joined: 24 Mar 2014
Posts: 2
Location: Brazil
Expertise: I love coffee

Posted Mon Mar 24, 2014, 5:33pm
Subject: Gaggia Classic -> brew thermostat problem?
 

Hi guys,

I own a Gaggia Classic for 3 years, and today it started to always heat up the water to steaming temperature, regardless of setting to brew or steam mode. As if I had replaced the brew thermostat to a steaming thermostat.

Anyone faced a similar problem?

Should the brew thermostat replacement solve this issue?

Thanks a lot,
-- Eliseu
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D4F
Senior Member


Joined: 15 Mar 2012
Posts: 1,997
Location: USA
Expertise: I like coffee

Espresso: Gaggia Classic PID
Grinder: Baratza Forte-AP
Posted Mon Mar 24, 2014, 8:55pm
Subject: Re: Gaggia Classic -> brew thermostat problem?
 

Eliseu, welcome to CG.  Here is a great site to refer to with the Gaggia Classic.

Click Here (www.partsguru.com)

And the wiring diagram are available for 110 and 220 - 240V.

http://www.partsguru.com/GaggiaClassicCoffee.html

Basically the steam switch provides a bypass of the brew stat so that the brew stat can't cut off at its temperature.  If you are getting too hot with the brew stat, steam switch off, then likely the brew stat is bad. That assumes that the steam switch is working and not staying on.  The steam switch also control the 3 way so that with the steam switch on, the group is bypassed for water output.  If you open the steam valve and hit the brew switch, water will go out the wand and not the group if the steam switch is working normally and then if you continue to run "brew" and turn off the steam switch, water will exit the group and wand, and you can close the steam valve and shut off the wand.

If all that, then replace the brew stat :)

 
D4F also at
http://www.gaggiausersgroup.com/
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 475
Location: Canada
Expertise: Professional

Espresso: Giga 5, ECM Giotto, Rocket...
Grinder: Anfim Milano-Best
Vac Pot: No  :(
Drip: Some $30 thing from Walmart
Roaster: I buy pre-roasted.
Posted Tue Mar 25, 2014, 4:01am
Subject: Re: Gaggia Classic -> brew thermostat problem?
 

Is there a light that goes on and off to let you know when the element is on?
Does it go off at brewing temp despite the machine still heating?
What I'm getting at is it could be a cracked/shorted element.  Do you have a multimeter?
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SJM
Senior Member


Joined: 17 Nov 2004
Posts: 1,716
Location: CA
Expertise: I love coffee

Espresso: SAMA (2), Maximatic, Cremina...
Grinder: K-10PB, Rancilio MD-50
Vac Pot: no like
Drip: no like
Roaster: HotTop   Huky en route
Posted Tue Mar 25, 2014, 9:02am
Subject: Re: Gaggia Classic -> brew thermostat problem?
 

Replace the brew stat.
Order it from Espressoparts.com since they will ship the parts free.  (Be sure to enter the code for free shipping and update your purchase).

If that doesn't work (which would surprise me) you might try the Gaggia Users Group for more help

http://www.gaggiausersgroup.com
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eliseujr
Senior Member


Joined: 24 Mar 2014
Posts: 2
Location: Brazil
Expertise: I love coffee

Posted Tue Mar 25, 2014, 9:07am
Subject: Re: Gaggia Classic -> brew thermostat problem?
 

Thanks a lot for the info guys.

The steam switch seems to be fine, since it's blocking the group flow when it's on.

I'll replace the brew stat and will follow up to this thread to let you know.
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