So my ******* add coolant light is coming on from time to time. Its not leaking out on the floor, its not going over to the overflow tank then boiling out and its definitely not a leaky seal.



Any other ideas where it could be going?

 

are you actually loosing coolant or is it just the light/buzzer telling you that?

 

I cant tell exactly, the filler neck level is definitely fluctuating but whether its just from change in pressures I cant tell.