Temperature sensor relay - where is it located ?

  1. Infrequent Poster Joined: Jun 2010 cornwall Posts: 159 green saxo1.1
    #1
    Cooling issues on my facelift 1.1 Saxo. Temperature dash light on with fan after approx 15 seconds starting engine.

    Have changed head gasket, radiator, water pump, thermostat, both temperature sensors, bled the system, but not checked the temperature relay yet.

    Where is the relay located for the top temperature sensor in the thermostat housing ?.
  2. Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.
    #2
    There isn`t a relay just a sensor mate.
  3. Saxperience Forum Bum Joined: Mar 2009 Stoke-on-trent Posts: 2640 Mk5 Golf GTTDI Mk2 VTR Project
    #3
    Have u checked all wiring is ok to the temp sensor which controls the fan? And were the sensors changed for known working ones?
  4. Infrequent Poster Joined: Dec 2011 Ayr Posts: 160 Saxo VTR 52 Plate
    #4
    i think u need to check u have blead the system properly because i had the same light because i never done mines correct and then done it correct and problem was solved theres a good guide on how to do it right on here just use the search buddy
  5. Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182
    #5
    Sounds like the ecu doesn't know the temp so is bringing the fan on. Sensors are on the stat housing
  6. Infrequent Poster Joined: Jun 2010 cornwall Posts: 159 green saxo1.1
    #6
    Both temperature sensors are new.

    The system has been bled several times with a header. It is not an airlock issue, the engine does not overheat, but the fan/warning light are on constantly 15 seconds after starting the engine.

    Two mechanics have indicated checking the temperature relay.

    Any ideas where the is located ?.
  7. Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.
    #7
    Quote:
    Originally Posted by jack001 View Post
    Both temperature sensors are new.

    The system has been bled several times with a header. It is not an airlock issue, the engine does not overheat, but the fan/warning light are on constantly 15 seconds after starting the engine.

    Two mechanics have indicated checking the temperature relay.

    Any ideas where the is located ?.
    As stated their isn`t a relay.Don`t believe everything a mechanic tells you.
  8. Infrequent Poster Joined: Jun 2010 cornwall Posts: 159 green saxo1.1
    #8
    Okay, so no relay.

    Last week we tried yet another new temperature sensor (top thermostat housing) and traced the wiring from ECU to sensor, all okay, but still fan & warning light on ??.
  9. Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.
    #9
    Have you tried resetting the ecu by unplugging the battery for while?
  10. Infrequent Poster Joined: Jun 2010 cornwall Posts: 159 green saxo1.1
    #10
    Yes tried that, disconnected both terminals for 24 hours.
  11. Saxperience Post Whore Joined: Jul 2010 Morley, Leeds Posts: 8469 Civic ep3 type r powered by TDI NORTH
    #11
    what year is your 1.1.
  12. Infrequent Poster Joined: Jun 2010 cornwall Posts: 159 green saxo1.1
    #12
    X plate.
  13. Saxperience Post Whore Joined: Jul 2010 Morley, Leeds Posts: 8469 Civic ep3 type r powered by TDI NORTH
    #13
    have a look on the radiator for the thermostatic switch it will be a blue swwitch with a 3 plug connector. un plug it if the fan is still on its a relay.if the fan goes off then its the switch.

    if you dont have one its a relay problem
  14. Newbie Joined: May 2013 Somerset Posts: 24 VTS
    #14
    The fan relay on my VTS is underneath the radiator behind a black plastic triangular cover. I removed the front bumper to get to my mine.
    Presume it's the same on all models.
  15. Infrequent Poster Joined: Jun 2010 cornwall Posts: 159 green saxo1.1
    #15
    Quote:
    Originally Posted by Bedford126 View Post
    have a look on the radiator for the thermostatic switch it will be a blue swwitch with a 3 plug connector. un plug it if the fan is still on its a relay.if the fan goes off then its the switch.

    if you dont have one its a relay problem
    There is no thermostat switch on the radiator.

    Which relay, and where is it located ?
  16. Saxperience Forum Bum Joined: Dec 2012 Perth Posts: 3665 Peugeot 106 1.1 Turbo Peugeot 106 1.5D Turbo Peuge
    #16
    Is it a front mount fan on a 1.1? the fan relay is on the fan housing itself. Probably behind a plastic door.

    If it's a rear mount fan, then the relay will be kinging about in or around the fuse box, thinking about it logically
  17. Infrequent Poster Joined: Jun 2010 cornwall Posts: 159 green saxo1.1
    #17
    Quote:
    Originally Posted by MartinObviously View Post
    Is it a front mount fan on a 1.1? the fan relay is on the fan housing itself. Probably behind a plastic door.

    If it's a rear mount fan, then the relay will be kinging about in or around the fuse box, thinking about it logically
    Yes, it's front mounted, checked that connection a while back, and reconnected the earth strap to the body. Will check out tomorrow.

    Thanks for the info
  18. Infrequent Poster Joined: Jun 2010 cornwall Posts: 159 green saxo1.1
    #18
    Problem still not solved. Apart from the actual ECU being faulty, any other suggestions ?.