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Unread 08-20-2007   #1 (permalink)
paperchasn365 is offline Made Member

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Default 2000 Mustang GT, Low Coolant/Radiator Light

For some reason, my low coolant/radiator light keeps coming on. it will only do it after 20-30 minutes of driving and will usually turn off once i turn the car off and will stay off until i drive it again, after it has sat for a while. It doesnt always come back on, but i would say 3 out of 5 days it will. Its not low on coolant and im not sure what else it could be. bad sensor? old coolant?
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Unread 08-20-2007   #2 (permalink)
reivaxtorres is offline Senior Member

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could be a bad coolant sensor, which is inside the overflow tank. sometimes they get stuck, but here is what i would do before i replace anything.

let the car sit overnight, tomorrow morning turn on the car, take the radiator cap off, and fill it up to where its supposed to be. with the car on, the coolant is passing thru the block already so it will be a true level reading. i had it do that to my car when i flushed the system. i checked it and it was fine, turned it on and the low-level light turned on, turns out all the coolant in the overflow tank got sucked into the engine, so i just had to keep re-filling it till it was full. total i had to re-fill it after i thought it was full about 3 times.
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Unread 08-21-2007   #3 (permalink)
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if that does not fix it, then a bottle likely will.
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Unread 08-21-2007   #4 (permalink)
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I think reivaxtorres might be on to something here, I have seen airpockets trapped in the cooling system do the same thing. Certainly worth checking into since it is free......


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