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astra diesel van help needed
oadamo - 11/9/07 at 05:48 PM

hi ive got a astra van but the rad has stoped coming on and its over heating.
ive checked the fan and it works. theres a sensor with one wire i think its the temp gauge. and a sensor with two wires next to the this sensor i dont no what this is for but i jumped the wires and it didnt do anything and theres a sensor on the rad if i jump the wire on the rad the fan comes on. do you no what the sensors are for and how i could simulate the water getting warm so i could see what sensors have gone.
thanks adam

bigrich - 11/9/07 at 06:11 PM

single wire sensor is for the gauge the other is linked to the glow plug system if i recall correctly to turn the plugs on for a shorter time with a hot engine etc the rad switch is as you say for the cooling fan and if bridgeing the wires together makes it work then change the fan swicth. very common fault

Rich

oadamo - 11/9/07 at 06:38 PM

quote:
Originally posted by bigrich
single wire sensor is for the gauge the other is linked to the glow plug system if i recall correctly to turn the plugs on for a shorter time with a hot engine etc the rad switch is as you say for the cooling fan and if bridgeing the wires together makes it work then change the fan swicth. very common fault

Rich

thanks rich it makes sense now.ill get a new one tomorrow.
adam

rusty nuts - 11/9/07 at 06:46 PM

If a new switch doesn't cure the problem get the rad flow tested by a radiator specialist. Not uncommon for rad to be blocked internally