calibrated?
Put it into a pot of boiling water (it should read 212* F).
Put it into a cup of crushed ice water and swirl (it should read close to 32* F)
If it doesn't do these things, you know it's off by "x" degrees. Some thermometers have a small nut underneath the face of the thermometer so they can be adjusted others however do not.
I put it into crushed ice and it got water inside the case.. I dunno it is acting funny but I guess you get what you pay for.. 3 bucks. The temp chagne in ice lol
Analog controllers are rarely very accurate. Just work with the offset.
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