coolant light

I was sitting at a stop light.. car is idleing fine.. temp gauge is fine.. Low Coolant light comes on.. i hit the peddle and it goes away.. didnt think much of it.. so as im heading home i have to go up a big hill and it put a load on the engine no doubt about it.. then the temp. gauge goes up.. i get home i pop the hood look at the coolnt bottle and that is at the line its supose to be where its at.. when it cools down i come back out pop the rad. cap.. that is full in there.. obvisouly the question here is why is this light comming on?.. now i do have a minor leak in the termostat gasket.. but i dont see how this would cause a problem with the low coolant light.. any idea's?.. i was thinkin' maybe the sensor in the rad. is shot?..

If the reservoir is full, tap it with a rubber hammer a few times. Sometimes the float on the sensor gets sticky.

i thought i only had the sensor in the radiator?.. ill check it out during lunch..

it is wise to flush out the coolant tank when you do a cooling system flush. A lot of grime accumulates in that tank.

its most deffinatly clean.. new rad. new engine.. cleaned the tank when i re-built the motor..

im thinkin ground problem?.. but if the rad. is plastic what does it really ground to?..

I had the same problem, I just disconnected the wire going to the sensor intead of replacing it. There should be 2 wires going to the sensor, and the sensor is just a switch.

the one in the radiator has only one wire.. yellow wire..

WagonLover wrote:

the one in the radiator has only one wire.. yellow wire..

I was talking about the sensor in the tank on an LT1, woops!

Yeah, I assumed an LT1 car too. Sorry.

so i was stuck in traffic last night after driving for about 45min.. as i was stuck in traffic the coolant light comes on.. i step on the peddle and it went away and came back on after about half a minute sitting still.. hit the peddle and goes away agian.. so on.. i checked the connection to the sensor in the radiator.. its fine..

If the temp goes down when RPM goes up, it's the pump

nah.. not the pump.. im investing in a sensor today..

would the fan clutch make the low coolant light come on?..