V8 Engine Coolant tell light turn red

[ck4men]

Hi guys:
Does any one knows what might be for the Engine
coolant light to turn red? (it once turned green,but I
added some coolant and the problem was solved), The
water temperature seems normal.

Thank for any help

[rob.e]

Calvin - the coolant light turns red when you have low coolant level. I think it also will flash if you have excessive high coolant temperature. Its all covered in your owners manual.

cheers
Rob

[ck4men]

Thanks Rob For your info, But I Already add coolant and the level seems to be right.
The odd thing is The light stays on all the time,even the car is cold.
Any suggestion ?

[cnh1990]

Check for a disconnected header tank sensor wire. If the connection is bad or comes unpluged from the spade connector it displays such a indicator on my car although it is a 4 cyl.
Calvin 90 SE

[ck4men]

finally my car is fixed,it turns out to be the sensor, I took it out from the coolant tank, clean it with water and shake a little bid to loose the stucked float sensor.

Thanks you all guys !

[cnh1990]

If the sensor is all gunked up the coolant must be nasty. You did change the coolant in the system???
Calvin

[lotusman]

Since only Calvin said what year and model Lotus he has then I will tell about my '89 non-SE light coming on. When the temperature reaches 80 C the light starts to flicker then comes on steady. When I rev the engine, the light goes out but comes back on when I back off of the gas. I flushed and changed the coolant and put in a new low level sensor, after cleaning the contacts with Stabilant.

I have jiggled the sensor wires and still the light comes on. Interestingly, if I warm up the engine but not drive it, the light does not come on!!

I put the No 15 chip in the ECM and afterward, starting getting this light problem. Don't know if there is any connection.

Also, is there a way to change the temp at which the fans come on? That current 93 C value bothers me.

Lotusman

'89 non-SE

[cnh1990]

That is really strange. Change back to the old chip and see if it still does that.
Calvin 90 SE

[ck4men]

Hey Calvin:
You are right my coolant should be thirty as hell,can you tell me how to clean it?

Calvin Lin