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the light is triggered by a switch inside the overflow bottle, If the coolant level is low when the engine is cold, it will trigger the switch to turn on the light until the cooant warms up and expands. The hot water expands and flows through the radiator cap and into the overflow bottle and shuts the light off. Then once the engine is shut off and cools down, the coolant will flow back into the engine again and empty the overflow bottle. so if the light is on, you need to fill the overflow bottle to the "cold" mark.
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1997 Audi A4 Stays cold after running?
Thermostat failed in open position or radiator fan permanently on
A blue light shows up on our 2003 Toyota Echo when you turn the car on and stays on for roughly 5 minutes before disappearing. What does this mean?
It means your engine is cold and you should wait for it to go off before you gun it on the freeway ________________________________________ Exactly, it means it is a cold engine light, it will disappear after the vehicle is driven and warms up.
My 97 Pontiac Transport low coolant light is constantly flashing even though the radiator is full of antifreeze what could cause this condition?
The coolant sensor is in the overflow tank, make sure it is full to the cold line. If it still stays on the level sensor might need replacing
What do you do for a 2002 Chrysler Town and Country that is only blowing cold air and no heat?
check to make sure there is coolant in the radiator. if not, fill it, and bleed the air from the system by leaving the radiator cap off until it has warmed until normal operating temperature. Keep topping off the radiator, then cap when it stays full.
How do you drain the radiator on a 1995 Ford Mustang?
1 turn on car 2 take radiator out 3 soak in cold water for 2 minutes 4 put radiator back in 5 turn car off 6 it should be drained and working now
How do you turn off brake dash light on 1999 Acura CL?
This happens whenever the weather gets too cold the brake Dash light stays on but not a problem it should go away after you drive for like 10 min depending on how cold it is
Why would the coolant light come on and the heater blow cold air in a 1985 Cadillac Deville 4.1 even after you tried replacing the thermostat and flushing the radiator?
Heater core (radiator) needs to be cleaned or changed
What causes Coolant indicator light to come on when you first start your car?
Check to coolant level in the coolant recovery tank and radiator when engine is cold
1996 cavalier check engine light is on with the radiator fan running but radiator is cold any answers for this?
Check the fan relay for the 1996 Cavalier. Also, check the coolant sensor, one of these is most likely bad.
Why no heat elantra?
Check the engine coolant level. My 2004 would blow cold at a stop light, then warm by the next light. The top radiator hose was leaking causing the level to be low.
Do you check radiator fluid when car hot or cold?
Do it when the car is cold if the radiator is hot fluid may be forced out when you take off the cap.
What material stays cold forever?
Marble
