FIAT PUNTO 75 SX DASHBOARD LIGHTS

I have a Fiat Punto 75 SX and once it has been running for awhile a red light comes on on the dashboard above the temprature symbol, i have changed the
thermostat, radiator and fan plug but none of this has seemed to have made a difference can anyone help ? Thanks !
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stuff you need too be checking, does the cooling fan cut in? if not why, has the fuse blown, does it have power, is the fan switch not getting hot enough. does the heater run hot? if not why, is there air in the cooling system? does the engine run rough when you first start it up when cold? if so, this could be a sign of a failing head gasget. really i expect the problem is most likly from air in the cooling system from a failing head gasget but i could be wrong. good luck :)
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comes on on the dashboard above the temprature symbol, i have changed the thermostat, radiator and fan plug but none of this has seemed to have made a difference can anyone help ? Thanks !
Is the engine getting overheated as the light indicates? Or is it a false light?
Jasper
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