HOLDEN COOLING FAN STAYS ON

I Was Hoping Someone Could Help Me Out My Cooling Fan Will Only Go Straight To Full Speed And The Car Temperature Is Only 60 Degrees Celsius...

What Temperature Should The Inside Dash Gauge Get To Before The Cooling Fan Comes On When Car Is Idling.

Temp Gauge Rises To Halfway When Warm, Then Drops To Cold And The Engine Light Comes On And Fans Kick In. The Revs Also Rise To 1500 Rpm On...