Hi, 1995 850 Turbo. I've got a constant coolant level warning light. The bottle is full. Do the sensors go bad/get corroded? I've checked the external connectors and they look OK. Is there a way to clean the sensor inside the bottle? Or should I just get a different one from the local Rip n' Strip?

Thanks

 

I've seen the float stick and the sensor wiring come apart. If the float sticks, you need a new reservoir.

 

Replace the sensor it's pretty cheap. I've heard of some which gone bad...
Just don't "fix" it as someone did on the car from my boss (V70)
He shorted the 2 leads . This "silenced" the lamp in the cluster.
However this costed my boss an engine, as the radiator hose broke and the car lost all of it's coolant, no warning light came up. When it did lit (engine overheating) it was to late...
2012-12-20-13-19-48 : Ohne Worte... : Volvo 850, S70, V70/XC70 I, C70 I : #205798650

From where I come from we have a saying: "God's garden is infinite, however there are some people who managed to jump over the fence"