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I have been installing float switches in Volvo coolant reservoirs as part of low coolant circuits for some time now. A few years ago I purchased a dozen of them. At this point my supply is exhausted.
These old switches were installed in the bottom of the reservoir and as long as there was coolant present the circuit remained open. When the coolant level dropped the float fell and completed the circuit which illuminated a light on the dash.
The only ones I have found would keep the light on until the coolant was low and then the light would go out. In the past removing the clip and turning the float upside down would change it to being normally open rather than normally closed. Unfortunately the ones I have found don’t offer that option- they are normally closed regardless of the float’s orientation. I think I would find the light being on all the time annoying and going out isn’t much of an alert when the coolant gets low.
Does anyone know where I might find float switches that will complete the circuit when the coolant level falls?
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Any twenty minute job is just a broken bolt away from a three day ordeal
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