Ron, my temp is usually at 100c or over and hits 115c when it's really hot.
Oil temp is usually around 90c but also has been to 115c when super hot. All is well....If the thermostat was stuck, it would have pinned the water temp gauge, not stop at 100c. My thermostat is a 195deg.
Ed, I know aspirin will work in most cases, however, Ron will need 100mg of Zoloft with 3 shots of Quervo daily to completely eliminate his issues. (and don't call me in the morning)
As far as the temp gun...make a few adjustments. Lay it on a hard surface with the laser pointed toward a garbage can. Take a 5 lb framing hammer and make even blows across the surface...Now, put the pieces in a small plastic bag and discard. Your headache should disappear almost immediately.
I'll give you a call about next week..... tom