sounds like you have a blown head gasket
Perhaps "check your coolant water"
Engine coolant.
Low coolant.
You need coolant. This happened when my water pump went bad and I needed to refill the coolant.
it looks like a radiator with coolant in! it should be red.
Vehicle Coolant (Antifreeze) and i would put some in soon before major problems.
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it looks like a little coolant jug that comes on the bottom left side of the dash
Check your owner's manual. It is most likely a low coolant warning, but you need to better describe it for a good answer.
Usually this is not the case. It looks like a bad thermostat, because no way the coolant is not getting hot, but a rusted up thermostat would not open for the coolant to circulate. If I were you I will change the thermostat first than check the water pump.
It looks like water. Drinking water. Don't!
try taking out the thermostat and have you put to much oil and coolant in the radiator