Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Hot spots in Mash tun?!?!
Reply
 
Thread Tools
Old 10-17-2010, 10:27 PM   #1
Dgonza9
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2010
Location: Evanston, Illinois
Posts: 1,183
Liked 11 Times on 11 Posts

Default Hot spots in Mash tun?!?!

I was mashing away 10 gallons of Centennial Blonde. After doughing in, my temp was 148 instead of 150. So I took my trusty heat stick and used it to increase the temp to 150 or so. Took a lot longer than I thought, though.

I stirred a bit, then let it mash away. After about half an hour I noticed the temp had risen to 152. I decide to release a bit of heat by stirring.

Well, hot damn, as I stirred the temp soared almost to 160. I used some ice and stirring to bring it back down. It was at 144 before I knew it and I had to use the heat stick again.

I'm wondering if my thermometer is malfunctioning or if I need to do a better job stirring. Things is, I try to be cautious of bumping the thermometer stem too much. It's mounted thru a drilled stopper and I once bumped it and it began leaking and I had to stop and get it seated right again.

So what do you think? Hot spots? Poor stirring? Faulty thermometer?

Can anyone recommend a digital thermometer to me? When I'm trying to really dial in the temp the dial thermometer makes it rough on my eyes.

Hope the beer turns out!


__________________
On Tap: Belgian Barrel Aged Barleywine, Da Yooper's Oatmeal Stout, Breakfast Stout, Hop Your Face Off IIPA, Catcher in the Rye Saison, "Wino-head" Nelsin Sauvin Gumballhead.

Bourbon Barrel Duchesse De Bourgnone
Kegged:

Fermenting English Mild

on Deck: Lager?
Dgonza9 is offline
 
Reply With Quote
Old 10-17-2010, 10:41 PM   #2
snowveil
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Lebanon, PA
Posts: 610
Liked 54 Times on 39 Posts
Likes Given: 25

Default

definitely not stirring enough.


snowveil is offline
 
Reply With Quote
Old 10-18-2010, 12:20 AM   #3
RLinNH
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
RLinNH's Avatar
Recipes 
 
Join Date: Feb 2006
Location: Wrentham, MA
Posts: 1,000
Liked 26 Times on 11 Posts
Likes Given: 17

Default

Here ya go...


http://www.thermoworks.com/products/...FeFM5QodijTMLg


I have used this thermometer for 4 batches now, and I love it!!! And yes, I still have hot spots in my Mash. Stir and stir and stir. You'll still get them.
__________________
You Can Give A Man A Fish and Feed Him For a Day, or You Can Teach Him To Fly Fish And Spoil Him For Life

On Deck MaiBock Helles has Wings 5
Primary Bee Cave Brewery Kolsch 15, English IPA
Secondary Oktoberfest
On Tap Camper's Delight Ordinary Bitter
RLinNH is offline
 
Reply With Quote
Old 10-18-2010, 01:22 AM   #4
Dgonza9
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2010
Location: Evanston, Illinois
Posts: 1,183
Liked 11 Times on 11 Posts

Default

I like the thermometer, but price is steep for me.

I'm thinking of going RIMS in part because it's damn hard to stir a square mash tun with SS braid and 4.5" thermocouple sticking into it.
__________________
On Tap: Belgian Barrel Aged Barleywine, Da Yooper's Oatmeal Stout, Breakfast Stout, Hop Your Face Off IIPA, Catcher in the Rye Saison, "Wino-head" Nelsin Sauvin Gumballhead.

Bourbon Barrel Duchesse De Bourgnone
Kegged:

Fermenting English Mild

on Deck: Lager?
Dgonza9 is offline
 
Reply With Quote
Old 10-18-2010, 11:51 AM   #5
wilserbrewer
BIAB Expert Tailor
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 10 reviews
 
wilserbrewer's Avatar
Recipes 
 
Join Date: May 2007
Location: Jersey Shore, Jersey
Posts: 8,905
Liked 1108 Times on 862 Posts
Likes Given: 16

Default

As said above, stir more and wait a few minutes for the temp to stabilize. I never bothered mounting a thermometer, as I find it helpful to move it around the tun to check several spots for consistent readings. I have several of the inexpensive digital sticks available most anywhere and they seem pretty darn accurate.
wilserbrewer is online now
 
Reply With Quote
Old 10-18-2010, 12:13 PM   #6
ian-atx
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2008
Location: austin
Posts: 135
Liked 1 Times on 1 Posts

Default

Stir more. Also if possible use another thermometer to take readings around the mash. Also what I usually do is dough in a few degrees hotter than what I should, as it will lose heat as I am stirring. I do infusion mashes in a cooler, so I dont direct fire the tun.

Also, just got a thermapen as a gift...looking forward to trying that out in the mash.

If you don't want to drop the cash on a thermapen, the taylor brand of digital instant read thermometers are pretty good. You can usually find them at target. usually 10-20 bucks.


ian-atx is offline
 
Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Maibock mash temp question (Partial mash) motobrewer All Grain & Partial Mash Brewing 6 01-14-2015 01:51 AM
Keeping Mash temp during 90min Mash in 5gal Cooler MLT KYB All Grain & Partial Mash Brewing 13 01-30-2013 05:57 AM
Hot/Cold spots in MLT jyda All Grain & Partial Mash Brewing 9 01-04-2010 03:51 AM
Mash in Keggle - False Bottom vs. amount of mash water Griffsta All Grain & Partial Mash Brewing 2 03-24-2009 01:09 PM
partial mash.OG,break material,mash tun efficiancy questions dzlater All Grain & Partial Mash Brewing 9 07-07-2008 12:15 AM


Forum Jump