Jumpy peugeot water temp gauge

[sparks]

Hi,

Anyone know what this might be?

My 306 (1.4 petrol, don't laugh ) temp gauge has suddenly started reading high (100-110), but the engine is O.K ( coolant level fine, fans work with ac on, but not coming on with 'indicated' 100+ degrees). To add to the strangeness, if I put the heater fan on the temp jumps by 10 degrees!

Is this a common problem, should I be worried? It looks like an electrical glitch, but I need some reassurance, until I can get it to the dealer.

Any help greatly appreciated

Sparks

[deltaf]

Are the radiator cooling fans cutting in and out while car is stationary, like at the lights?
If theyre working(dont mean when ya switch a/c on) then id say its an electrial fault.
Usually the temperature sender, but could easily be the gauge....funny that its jumping when you switch other things on and off...could be a regulator fault...
Hope this helps.

[sparks]

Cheers Deltaf,

Fans don't seem to come on when stationary (don't think temp is high enough @ 10 degrees ambient). Switch off engine and leave for 30 mins, and it drops to 60-70.
I get the feeling it is electrical on the gauge side, as it moves (noticably!) when you switch on the heater fan.

I will get it checked soon, but I can't for a few days (wife has the car and I'm not around).

Sparks