[apk919]

Originally Posted by Mag

yes using the tc4. I ordered a thermocouple sensor kit from innovate and it works perfect so the wrong reading has something to do with the thermo couple wire in question (which was sourced seperately).

yes when exposed to ambient, temps are 10c higher than actual.

as of now, have one end of the wire to the tc4. The other end is about an inch exposed from insulation, twisted and soldered.

My only guess is that the wrong solder was used.

This might be too obvious a question, but is the separately sourced thermocouple wire type K (chromel-alumel)? I don't know how much the type of solder matters as long as the two wires are twisted together (i.e. lots of contact area) first. Have you checked the thermo wire's accuracy without soldering (just twisted) as well?