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Old 08-31-2008, 09:23 PM   #1
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Default Mini Mash - too hot for 10 minutes

I was doing a Mini Mash yesterday and after I reached 160 degrees I turned off the stove. Moved the pot most of the way off the burner and watched it for a few minutes.

I then went off and came back in 5 minutes later and noticed the temp was at 170.

So - for 10 minutes my mash was at 170.

Is this a huge problem????

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5lb Extra Pale LME


2.5lb 2-row
0.5ln crystal 90L
0.25lb victory
6oz Munics
3oz Biscuit

0.75 oz Perle 60min
0.50 Mt Hood 15 min
0.25 Glazier 5min

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Old 09-01-2008, 02:55 AM   #2
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Yes, you de-natured the conversion enzymes.

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Old 09-01-2008, 02:58 AM   #3
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Did you end up low of the predicted OG. I brewed on Friday and my temp was too low for a few minutes, then to high towards the end of the hour. My OG was .002 lower then what it should of been and I am wondering if it was because the temp was too low in the beginning or too high at the end.

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Old 09-01-2008, 04:46 AM   #4
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Quote:
de-natured the conversion enzymes.
What does that mean???

Quote:
Did you end up low of the predicted OG
actually 2 high 1.050 I had 1.052

I'll be interested on what the FG is.
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Old 09-01-2008, 05:29 AM   #5
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When an enzyme is denatured it will no longer function because the structure of the protein(enzyme) has been changed and unfolded.

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Old 09-01-2008, 05:38 AM   #6
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Quote:
Originally Posted by Grinder12000 View Post
What does that mean???
Think of it as having killed the bugs....even though the bugs are chemicals.
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Old 09-01-2008, 11:24 AM   #7
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Grinder12000,

You ask, "Is this a huge problem????"

I say no, not a huge problem at all. More than likely your finished brew will be different than intended, but tasty none the less.

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Old 09-01-2008, 11:29 AM   #8
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If you were heating the mash on the stove all the while, then I'd say it passed through the sacc zone and was converted before it had time to denature. It should be ok.

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Old 09-01-2008, 12:54 PM   #9
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I wouldn't even say it was a little problem, let alone a huge one. It might end up with a higher FG if you extracted a bunch of unfermentable sugars, thus, a little sweet.
Next time give the wort a little stir when taking temp readings. You may have taken your reading in a cool spot first, then a hot spot later (not sure about your setup or even if your thermo was calibrated)

Like it was said earlier, it'll still be beer, and probably still good too.

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Old 09-01-2008, 01:37 PM   #10
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I have one of those glass top electric stoves - turn it off and it continues to heat.

It sounds like if you are going to error on temp lower is better then higher???

Thanks guys!

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Last edited by Grinder12000; 09-01-2008 at 02:35 PM.
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