Results 1 to 10 of 10
Like Tree1Likes
  • 1 Post By dumiya

Thread: Rancilio Lucy (Silvia) only 70deg

  1. #1
    Member
    Join Date
    Jan 2009
    Posts
    69

    Rancilio Lucy (Silvia) only 70deg

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    G'day, I've had my machine for years and I noticed that my shots were coming out tasting sour so I check the temp of a shot and its only about 70deg (It used to be closer to 90 when I got it). It steams just fine though. Should I just change the brew thermostat? I thought the thermostat would either work OK or completely fail? Any thoughts?

    Thanks.

  2. #2
    Member
    Join Date
    Aug 2010
    Posts
    82
    how did you check the brew temp?

  3. #3
    Member
    Join Date
    Jan 2009
    Posts
    69
    Quote Originally Posted by bosco View Post
    how did you check the brew temp?
    Thermometer in a pre-warmed shot glass. I tried several times over a weekend.

  4. #4
    Member
    Join Date
    Apr 2016
    Posts
    78
    I recommend installing a PID on the Lucy if you plan to keep it for a couple more years, worths every cent

  5. #5
    Member
    Join Date
    Aug 2010
    Posts
    82
    It is hard to get an accurate temp without specialised equipment. Before installing pids or replacing thermos, I would try/examine a few things.
    Sourness can be under-extraction. This can be caused by low brew temp, but is more common in under dosing, too coarse grind, and stale coffee. Try some freshly roasted freshly ground coffee. Dose to your basket's recommended weight (stock singles are normally 12g, stock doubles 18g). If you don't have scales, over-fill basket and level off at top using your finger or a card or similar (without compacting at this point). Tamp evenly in a way that you can replicate each time.

    *** I have no interest in opening a debate on tamping method, so can we all agree that a consistent even tamp is acceptable in this instance? ***

    Your extraction should take 2-3 seconds to begin and come out dark and syrupy. As the extraction continues, it should become lighter and should be stopped in roughly 25-30 secs, yielding roughly twice the weight of coffee that was used.

    This is a very generalised approach, but should be a solid foundation for problem solving. If you are following the same steps each time, you can rule out possible issues and diagnose the problem.

    I hope this is helpful and clear.

  6. #6
    Senior Member
    Join Date
    Dec 2006
    Location
    Perth WA
    Posts
    572
    I would also suggest give the brew pathway a very good clean with a detergent cleaner like Caffetto. I had very sour taste in another brand of machine. The sour tasting deposits built up over time. Even though it was regularly cleaned the cleaning was not thorough enough.

    (Added) let the solution remain a while in the machine before repeating the cleaning process.
    bosco likes this.

  7. #7
    Member
    Join Date
    Jan 2009
    Posts
    69
    Thanks for all the replies. I've had the machine for about 10 years and it has produced good coffee in the past, done the descale and espresso cleaning with Caffetto. My dosing is good and consistent along with my tamping. I'm pulling about 30ml in 25sec so my grind is OK. It's just my measured temp the has me concerned as mentioned in the opening post?

  8. #8
    Senior Member
    Join Date
    Dec 2006
    Location
    Perth WA
    Posts
    572
    That of course is the problem. No one as yet has posted a solution to measuring the water temp as it hits the grinds. There are professional instruments that do this. For that it needs to go to a service centre with the correct equipment.
    There was a home hade scarce(?) thing in the for sale section. It was made from a filter basket with a temp measuring bead on bottomless handle.
    It could be made but it sacrifices a filter basket and requires a bottomless handle to get the cable to the measuring unit (cheap at Jaycar)

  9. #9
    Member
    Join Date
    Aug 2010
    Posts
    82
    Sounds like you have ruled out a few of the easier options. If you are handy, you can replace the thermo yourself for about 20 bucks. Otherwise, you should take it to get repaired. Will cost a bit more, but should be worth the expert knowledge. (still possible it is another issue all together)

  10. #10
    Member
    Join Date
    Jan 2009
    Posts
    69
    Quote Originally Posted by bosco View Post
    Sounds like you have ruled out a few of the easier options. If you are handy, you can replace the thermo yourself for about 20 bucks.
    I'm handy enough to do the thermostat replacement myself.

    Quote Originally Posted by bosco View Post
    (still possible it is another issue all together)
    What other issue should I be looking for?

    Thanks.



Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •