Unpegging a gauge

[tinys s14]

Hello all I have a 60mm greddy water temp gauge and it pegged and I have no idea how to reset it. Anyone has any info please let me know

[brndck]

if it is a "warning" gauge, (the one you can set a flashing red light when it goes above a certain value) then twist the knob labelled "warning" very very slightly, just enough for it to register.

photo is just for reference.
http://i.ebayimg.com/t/60mm-greddy-silver-oil-pressure-gauge-warning-meter-/00/s/MTIwMFgxNjAw/$T2eC16d,!zUE9s38+p7qBQ5EQFkzT!~~60_35.JPG

i have 3 greddy warning gauges (h2o temp, oil temp, and oil pressure, and some times the h20 temp will stick full pegged when i shut the car off. i just barely twist the warning knob next time the car is running and it springs back to the correct reading.

[tinys s14]

dam it not a warning gauge