Odd situation - Have a bottom mounted water level sensor . Ever time the engine revs above 3000 rpm the light comes, hot or cold.
Checked with cap off and water level does not drop when it reaches this rpm.
Tried the wiring not found any fault
Any ideas other then a dodgy sensor which are NFP.
Edited by PhilNW, 24 July 2017 - 01:44 PM.