Whilst driving home today from work in rush our traffic I noticed that the temp gauge was nearly in the red (top of the scale). I was in what you would say in slow moving traffic, however I only noticed it when at standstill but as soon as I continued moving forward (v.slowly) the needle quickly dropped to normal temp (middle of the scale). The odd thing was I only blipped the throttle to move off & the needle dropped to normal.
It stayed there until I was nearly home but them shot up 3/4 way up the scale for about 2 seconds then dropped but to normal.
I kept the fan heaters on hot on the way home just to see if there was a change in hot air temp, but that remained v.hot. (kept windows open)
My old car had headgasket failure & had symptons of heater blowing hot & cold air whilst temp gauge was in the mid to high scale. It would lose water after a quick blast from the expansion tank.
This one is a bit strange. The needle of temp gauge would move quite quick back down from 3/4 to mid way on the scale whilst stationary.
Ive not done anything to the car recently besides the usuall checks. Everthing appeared ok.
Popped the bonnet & no signs of any water/steam bubbles from the expansion bottle (passenger wing/battery side).
Waited for it to cool down & checked the water level, no loss of water & the level seems fine.
Could I have a problem with the coolant temp sensor? not showing any faults on ecu check? Do these have problems failing but not showing up on the ecu?
Or possibly faulty with the dash temp gauge?

Any ideas please?
Thanks Ticky

 

Are the radiator fans cutting in ??

 

Yes

 

Did you solve this problem?

I Seem to have the same problem. It has got slowly worse over the last week. the neddle goes to the mid way line as soon as i start her (cold mornings) and today it was in the red by the time i got to work. :S

 

i have this promlem too now any one know what it could be