By how much do you think it's off? Lots of variables, start with the laser thermometer will vary by as much as 5 degree depending on the surface finish of the target. I'd guess the gauge is probably only good to +/- 5% so potentially 10 degrees off there. And where it is in the thermostat cycle will matter as the gauge will lag behind temp changes in the coolant.
But if the laser says 180 and the gauge says 200 .. or vice versa .. yeah, probably a problem somewhere.
Electric or mechanical gauge?
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