temp needle not budging

1. tom2008 L-plater Joined: Aug 2009 birmingham Posts: 73 vtr'd saxo furio

   #1 11th May 2011, 20:21

   ok i was going down motorway earlier to work and when i got to work i noticed that my temp needle was right at the bottom could this be the thermostat or the radiator sensor or something more sinister?? i didnt notice the fan come on at any point im abit confused to be quite honest mate of mine said it could be the head gasket about to go also, what you guys reckoning
2. MunkyBoy Established Member Joined: Nov 2009 Maldon Posts: 2033 1. MK2 Chalked VT'd 1.1 2. MK1 VTS

   #2 12th May 2011, 10:15

   Start the car and let it build up for a minute, then check to see if you have any pressure in the pipes to and from the rad.
   
   Are your blowers blowing hot air out if you turn the heaters on full?
   
   If nothing on the temperature needle, try rebleeding the system fully to get rid of air with just water (No need to waste antifreeze on testing!) and see if it moves a little?
   
   Again, if not... replace the thermostat (£7ish from a local motor shop) and then rebleed again properly to see if the needle works.
   
   I rebled mine last night as I had a masssssive airlock, doesn't take long at all, and runs beautifully cold now.
3. MunkyBoy Established Member Joined: Nov 2009 Maldon Posts: 2033 1. MK2 Chalked VT'd 1.1 2. MK1 VTS

   #3 12th May 2011, 10:16

   Oh, Ps.
   
   If you turn the car off completely after it running... then switch back to ignition, does the needle move at all? Like, anything? Could actually just be your motor on your dials is broken?
   
   Could do the easy thing of resetting the ECU by unplugging the battery for half hour or so, and see if it changes anything!
4. tom2008 L-plater Joined: Aug 2009 birmingham Posts: 73 vtr'd saxo furio

   #4 12th May 2011, 15:58

   Basically when I turn on the
5. tom2008 L-plater Joined: Aug 2009 birmingham Posts: 73 vtr'd saxo furio

   #5 12th May 2011, 16:00

   Basically when I turn on ignition it goes up to it's starting point but then afta half hour it's still at the same spot the heaters do blow hot on all levels of power so I'm abot confused tried thermostat and got nothing amni right in thinking rad sensor??
6. MunkyBoy Established Member Joined: Nov 2009 Maldon Posts: 2033 1. MK2 Chalked VT'd 1.1 2. MK1 VTS

   #6 12th May 2011, 16:15

   You tried changing the thermostat?
   
   Does your fan ever kick in?
7. user_40784 Saxperience Forum Bum Joined: Jan 2010 London Posts: 2768

   #7 12th May 2011, 16:16

   If everything else is working fine but the needle then its very likely a fualt in the dash. Wouldnt worry about it.