Bad or dirty connection to the level sensor could be causing this. Coolant level low will result in the coolant light coming on and off during cornering, accelerating, decelerating. In a GM dealership for service they tell me they cannot locate the problem. I did notice recently(before the change) my car was starting to make puddles, but a pump going bad at 31k? I am reluctant to take it to the dealer because things may or may not be covered under warranty and dealer fee's are killer. Radiator light comes on and off intermittently. I read that the water pump would cause the tank to spit coolant out like mine was, so I think it may be my next target. There are no wet marks or leaks anywhere I worked so I took care of that. This morning I have the same amount of coolant as I did before the swap(barely any) and added top up. Figure its possibly from air being in the system so I left it alone to fully cool off over night. As I am pulling out of the garage I hear the water sloshing sound through the dash(heater core) again. If your blinker doesnt blink, or blinks rapidly, you likely have a burnt out bulb. Left the vehicle in the garage for about 3 - 4 hours and went to leave. Usually turning off the car and turning it on would result in drips. Filled tank with Dex-cool and drove the car around for about 15-20 minutes, pulled back into the garage and found no loss of coolant. Took about an hour but I did the swap, made sure everything was nice and snug. If you are certain the coolant level is good, I would suspect a faulty sensor (or wiring / connector). Now my initial impression of this is that the door is jammed or broken.Ok, received the replacement tank and cap yesterday. When it's disconnected from the HVAC box and I give it power it moves all the way to the next notch. When it's connected to the HVAC box and I power it - it only moves about half way to the next notch. There are two little notches on the actuator. It is crucial to check the coolant level regularly and add coolant if needed. When the coolant level drops below the recommended level, the sensor triggers the warning light. (reconnect power and move temp knob cold to hot and vice versa) The knob on the actuator moves twice as far when it's disconnected from the HVAC box. One of the most common causes of the coolant warning light is a low coolant level. Is the door we are talking about being moved by this actuator? If so I should be able to spin it with my hand right? I have no idea what I'm doing with this HVAC project responses are greatly appreciated.ĮDIT: Ok I had an idea to try the actuator again after it was removed. The Charging System Light (left thumbnail) comes on in Red, the Low Coolant Warning Light comes on in Yellow. This may result in especially low or high coolant temperature readings, your vehicle underperforming, or your Check Engine light may come on. Then engine heat light came on 3 different times and the temp was 247 but immediatley dropped back to 203 when stopped. Should I be able to spin that knob with my fingers? I can't get it to move with my fingers. Low coolant light kept coming on mostly when hard braking. It only spins maybe an 1/8th of an inch, is that right? I then removed the actuator. I could see that little piece on that actuator moving.
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