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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Messed up Mash
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Old 08-09-2012, 03:22 PM   #1
Gilbey
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Default Messed up Mash

I brewed a batch last night and had some problems that I should have avoided but didn't.

I use a cooler as a mashtun. I added my strike water 10 degrees hotter than beersmith calculated and let it drop down to the desired dough in temp as I always do. This method that I learned here on HBT works great for me. I added my grain, started my hour timer, stirred and took my temp, 155, so I stirred for about 5 minutes and got down to 154 where I wanted to be. I closed the cooler and left the therm probe in the cooler as I normally do to monitor temp.

I went to clean my carboys. After 15 minutes passed I went to check and the temp was up to 162? Whats going on here? So I panicked and added some cold water to bring it down to 154 again, 5 mins later is back up to 168!!!! So FINALLY I realize that this is impossible and did what I shoudl have done in the first place. I got my back up thermometer, and sure enough my original one had gone haywire. Actual mash temp was now down to 146.

So, this is an IPA I wanted to mash at 154 for 60 minutes. I am pretty confident that I mashed at 154ish for about 20 minutes before I stupidly added the cold water and dropped the temp into the 145-146 range.

How dry do you think this batch will turn out??

Thanks in advance.

Alan

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Old 08-09-2012, 03:49 PM   #2
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What was your OG and what yeast did you pitch and did you use a starter?

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Old 08-09-2012, 03:52 PM   #3
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I would bet that most of the conversion happened by 20 minutes, with a temp of 154. I've had more than one mash show complete conversion by 20 minutes, when mashed in the mid 150s.

I wouldn't worry about it at all. The only thing you may notice, if anything at all, is that it may finish a bit drier than you intended and may have a bit thinner body to the final beer. All in all, probably good things in an IPA anyway!

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Old 08-09-2012, 03:56 PM   #4
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OG was measured at 1.056, just shy of estimated 1.057. Yeast is CA Ale, yes starter, put in carboys last night around 10:00PM, active fermentation by 7:00 AM.

Thanks Yooper .

Alan

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Old 08-09-2012, 04:23 PM   #5
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I did a similar mash at 152 for about 15 minutes and the 146 for 45. My OG was 1.060, wyeast 3944 with starter and it finished at 1.005. It was still a great beer!

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