The radiator symbol is showing but the reservoir is full what is the problem?

Answer 1

It could be one of several issues:

1. The sensor in the radiator overflow bottle is stuck, disconnected or damaged

2. The actual level of fluid in the radiator itself is low, perhaps caused by a blockage or interruption in the overflow tube that connects the radiator and the overflow bottle

3. The thermostat is stuck in the open or closed position, requiring a replacement of the thermostat

First things to check:

1. While the vehicle engine is COLD, check that the level of fluid in the reservoir does not exceed the COLD level.

2. Run the vehicle for 20 to 30 minutes of normal driving, then check the reservoir level. The level of fluid in the reservoir should be raised to the HOT level.

3. Let the engine completely cool for several hours. Check the reservoir level again. It should have dropped back down to the COLD level.

If the level in the reservoir does not change between the times the engine is cold and hot, you have a problem with your engine's cooling system. Wait several for the engine to completely cool, then open the radiator cap and verify that the radiator is full of fluid. Check the overflow tube that runs from the radiator neck to the reservoir bottle to ensure that it is free of obstructions.