how to get the rad fan to start on it's own?

1. user_29491 Saxperience Forum Bum Joined: Dec 2008 Lancs Posts: 4124 JP4S'd R.

   #1 13th June 2012, 22:32

   I have a mk2 VTR, which I 16v'd 7 month's ago..
   
   I fitted a 3 plug loom, but a single plug fan..
   
   To my knowledge the 3 plug fan kick's in when the ecu tell's it.. and the single plug is on a temp sensor?
   
   Either way I couldn't connect the fan to my loom, so had to wire in a manual switch inside so I could switch it on..
   
   Worried that when it goes for it's MOT, they might be funny about it. Or they might leave it running for ages for the emissions and it overheats.
   
   So how do I get it to come on, on it's own?
   
   Easier to connect it upto a temp sensor or however the single plug is set up? - as i have a single plug fan,
   
   Or get a 3 plug fan and connect it to the loom?
   
   
2. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #2 13th June 2012, 23:38

   just tell them about the fan? you could probably rig up a power feed using the sensor in the radiator if it has one but you can get thermostatic switch kits from ebay or whatever and most will allow custom temperature control for fan cut in
3. user_29491 Saxperience Forum Bum Joined: Dec 2008 Lancs Posts: 4124 JP4S'd R.

   #3 13th June 2012, 23:47

   Quote:

   Originally Posted by Gandi699 just tell them about the fan? you could probably rig up a power feed using the sensor in the radiator if it has one but you can get thermostatic switch kits from ebay or whatever and most will allow custom temperature control for fan cut in

   I will tell them about it, I just thought they might of been funny with it.
   
   I'm still using the 3 plug vtr rad, so it doesn't come with a sensor..
   
   I'll look into these kit's cheers
4. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #4 14th June 2012, 00:07

   Usually its a thermistor that slips inside a coolant hose and adjustable control, pretty simple
5. user_29491 Saxperience Forum Bum Joined: Dec 2008 Lancs Posts: 4124 JP4S'd R.

   #5 14th June 2012, 00:09

   Found one that a few people on forum's said was a decent switch for the price
   
   http://www.ebay.co.uk/itm/Variable-T...#ht_1880wt_980
   
   Ta for pointing me in the right direction!

   1 user thanked this post: littleblue1
6. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #6 14th June 2012, 00:27

   No worries, my dad had a couple of kenlowe fans fitted to his range rover but they sent a duff thermistor so we put one of the ebay ones on as a temporary fix until they replaced it. Worked well

   1 user thanked this post: user_29491
7. user_48023 Saxperience Forum Bum Joined: Oct 2010 Bournemouth/Edmonton/Chelmsford Posts: 2650 Audi A3

   #7 14th June 2012, 01:15

   I have a manual fan in mine that I fitted. Car had its MOT last month and was fine once I told them about it, passed straight away.

   1 user thanked this post: user_29491
8. user_29491 Saxperience Forum Bum Joined: Dec 2008 Lancs Posts: 4124 JP4S'd R.

   #8 14th June 2012, 01:18

   Cheers!
   
   I'm still going to put one of these switches on, Most garage's don't give a shit about other people's cars, so rather not risk it for sake of £7.50

   1 user thanked this post: littleblue1
9. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #9 14th June 2012, 09:42

   Wire it in parallel so you still get a fan override on the switch