Weber thermometer way off

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moist

Fire Starter
Original poster
Jan 12, 2015
51
10
Abbotsford, BC
So I went and got a new meat thermometer. Waiting until February to grab a maverick so I just grabbed another cheap leave in for now. Checked the accuracy in boiling water and it was real close. I've been having issues with meat cooking too fast and being a bit fatty at the end. Stuck the new meat thermometer in the lip vent to compare temps. When the weber read 200, the meat thermometer read 260! This explains a lot. Gonna grab a maverick dual prob in February to stop this from happening again
 
So I went and got a new meat thermometer. Waiting until February to grab a maverick so I just grabbed another cheap leave in for now. Checked the accuracy in boiling water and it was real close. I've been having issues with meat cooking too fast and being a bit fatty at the end. Stuck the new meat thermometer in the lip vent to compare temps. When the weber read 200, the meat thermometer read 260! This explains a lot. Gonna grab a maverick dual prob in February to stop this from happening again

Yep, if your referring to the stock therm, they are notorious for being inaccurate.... I have a Maverick ET-732 & igrill2.... Like them both a lot !
 
Most all of the therms that co me preinstalled in cookers, are decoration.

You did right, meat therm for now, upgrade to a Maverick or other quality unit soon.
 
How did you ck it in boiling water?  Pease see below - water does not ALWAYS boil at 212*F.  Coupled with the fact that you are measuring in the lid vs at the grate it might not be all that far off.  For instance, my water boils at ~210*F.  I cked my WSM thermometer and it was spot on.
Altitude (feet)Boiling Point (F/C)
Sea Level212.0 / 100.0
500211.1 / 99.50
1000210.2 / 99.01
1500209.3 / 98.52
2000208.5 / 98.03
2500207.6 / 97.54
3000206.7 / 97.05
3500205.8 / 96.57
4000204.9 / 96.08
4500204.1 / 95.60
5000203.2 / 95.12
5500202.4 / 94.64
6000201.5 / 94.16
6500200.6 / 93.69
7000199.8 / 93.21
7500198.9 / 92.74
8000198.1 / 92.26
8500197.2 / 91.79
9000196.4 / 91.32
9500195.5 / 90.86
10000194.7 / 90.39

Source: Boiling Point of Water vs. Altitude, K. Loomis, New Mexico State University Apache Point Observatory

Another way to determine your boiling point is to use a Boiling Point Calculator. By entering your current barometric pressure and your elevation, you can get a good estimate of your boiling point.
 
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Yep,  It is actually probably spot on. It is just hotter up in the dome of the lid than at grate level. I figure about 30 degrees or so on mine. I just keep that in mind if I'm not using the Maverick. I almost always do though.
 
I put my leave in thermometer in the vent in the lid. So it was reading the temp maybe 2" lower than the weber one. Shouldn't be a 50 degree difference lol
 
Once I'm done my smoke I'm gonna remove my weber thermometer and check
It in boiling water as well. Not to mention my weber thermometer is reading lower than my meat thermometer. Definitely out of whack. Makes sense as to how my meats been cooking faster than it should and ending up fattier than it should
 
there may be a nut on the back of the dial to calibrate it. I had a turkey fryer therm. I used to use for years before I got digitals and you could turn the nut back and forth to calibrate. Let me know what you find out. I actually think mine is closer than 30 degrees off.
 
Yep, if your referring to the stock therm, they are notorious for being inaccurate.... I have a Maverick ET-732


I found my igrill 2 probes to be about 7 degrees below boiling temps.  What about your's?

Ya know Shaggy, to be honest I thought mine were off as well... And my Mav too. Case (dirtsailor2003) pointed out this thread to me & my temp gauges are not off according to this ! Check it out man, hope it helps !

http://www.smokingmeatforums.com/t/...is-212-f-an-accurate-measure-of-boiling-water

Justin
 
Ya know Shaggy, to be honest I thought mine were off as well... And my Mav too. Case (dirtsailor2003) pointed out this thread to me & my temp gauges are not off according to this ! Check it out man, hope it helps !

http://www.smokingmeatforums.com/t/...is-212-f-an-accurate-measure-of-boiling-water

Justin

Yeah that!

My new Thermowand is spot on when I checked the calculator. Anyone looking for a new quick probe should look into them. I can't believe it does the same thing a thermapen will do for only $25.
 
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