Further to my other post (snapped timing belt) being sorted, I find we have one further problem, in that the radiator fan is going all the time the ignition is switched on.
It cannot be an overheating problem as it comes on as soon as you turn the key, even when engine is stone cold.
I found the wire and plug that goes to the thermal sensor/switch for the radiator fan, it was unattached and the previous owner had connected 2 terminals up with a bit of wire. Pull these out and the fan dies. The switch itself was corroded and all the points had snapped off and worn away.
It seemed obvious that the switch needed replacing, which I did (with a motor factor part).
Unfortunately, this did not solve the problem, as as soon as it was all connected back up the fan resumed running all the time.
My dad seems to think the new part I have bought might be defective, as why would the fan stop running when it is totally disconnected and yet run when connected to the new switch?
Does anyone have any experience or knowledge of this problem?
i suspect car has aircon?
if it has the easiest solution seeing as the aircon wont be working?
is to hard wire a positive cable up (fused) direct from the battery to the radiator switch and move to oneside the loom attachement
this way your fan will only come on at the prescribed 90+ degrees
im assuming your wiring faulty by the way and not an engine/water problem
this is how i did these astras
96 1.6 Radiator fan on all the time -
Not really a dodgy part.There is very little demand for this type of switch thesedays and the original GM part was very reliable.I would guess that the one you have bought has been languishing in a dusty old parts bin,dropped on the floor a few times ,and been totally neglected.Get a genuine part from Vauxhall;only snag will be the price;a lot more than your motor factor item.hth
I swapped the first switch I installed for a new one in case it was just a faulty part but with the same results - the fan stay on all the time.
Disconnect it completely and it goes off.
I have been told that most models of this car without A/C have a two plug switch and not a three, and after looking at the points layout of the original 3 point plug (which wasn't connected remember) compared to the new ones it is completely different.
Basically it looks like it was wired up wrong in the first place and that it has the wrong plug for this switch, making me think I need to change the plug to a two point one and get a matching two point switch.
Does this make sense? Can anyone give an opinion on this?