Fan not cutting in

[caffine]

Hi all

Was just wondering where i can get the the switch for the radiator fan, as when the car is sitting at idle it over heats

Not sure which one i'd need i have Astra mk3 Arctic II

any help would be appreciated

thanks

 

[Novaboi_1991]

ebay? breakers yard? vauxhall? i believe theyre the same so you shouldnt have any trouble getting one

 

[caffine]

Apprently they're not, according to the haynes manual there are two, single and twin speed, so I dont know which one to get

 

[micky]

Get both they just pences or just switch it directly!

 

[Novaboi_1991]

or go to a scrapyard and get them for free lol

 

[kompo001]

As a temp fix, remove the plug from the switch, fit a split pin between the two contacts on the plug, tape into place, fan will run all the time the ignition is on and car will run cooler, but better that then run the risk of blowing you head gasket.
|Get a new rad fan switch ASAP, remove split pin and re-connect plug, check coolent level.

 

[nige-p]

any one know what temp the fan is meant to cut in and then what temp it will cut out at

 

[kompo001]

any one know what temp the fan is meant to cut in and then what temp it will cut out at

Should cut in just under the 100c and then cut out at about 90c but all gauges read differently..................
Phil.

 

[D4N13L]

My temp gauge reads very irraticaly. Sat in traffic or driving around slowly it shoots up to 100. but then sometimes it just settles down to normal. I dont know if it is connected but the petrol gauge does something similar.

 

[tabetha]

It's suicide to switch it manually, unless you like doing head gaskets, stupid idea imo.
Look at the switch connector, how may wires does it have going to it, if it has two as I suspect then it is single speed fan, ie the switch simply acts as a on/off switch, bridge contacts see if fan runs, if it does buy new single speed switch, multi(2) speeds tend to be used on air con equipped cars, as uses slower speed for air con.
tabetha

 

[caffine]

Mine has aircon so i'm guessing its a multi

 

[carter]

fan switch will be fitted to the rad usually, also just check your fan spins as they can sieze up

 

[jampot]

A vehicle with a/c will be more likely to have a twin speed fan all mk3's ive worked on have had single speed.