xantia coolant light

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louis1
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Joined: 30 Nov 2002, 04:56
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xantia coolant light

Post by louis1 »

Hi first thing in the morning my coolant light and stop light come on and they go out after a few mins when the engine is warm, this happens every morning now since i put some radweld in the system to help fix a matrix, so does anyone know where the sensor is or how it works,etc
Thanks Louis
tomsheppard
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Post by tomsheppard »

The coolant level sensor works by measuring the conductivity of the coolant. If the two pins on the sensor are covered with muck or Radweld, they will see a higher resistance, convincing the electronics that the level is low and pulling on the STOP light. Pull it out and give it a clean. Then go and sell the car or buy a new radiator and matrix 'cos if this is your TD then you will almost certainly have murdered its head gasket having silted up the radiator! Not today but...
louis1
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Post by louis1 »

Sorry this is on the V6 Xantia and it only happens when engine is cold and the engine runs normally apart from this.
bxbodger
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Post by bxbodger »

This may be a bit obvious, but have you physically checked the level using the Mk 1 human eyeball sensor,torch, and a dipstick? It may be a bit low, and as it heats and expands it covers the sensor pins which then switches the light off- in other words it's doing it's job and warning you of a low water level, as it should.
Stempy
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Post by Stempy »

The header tanks are prone to leakage too. Easy enough to change and about £40.
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